diff --git a/scripts/generate_messages.py b/scripts/generate_messages.py
index f9c8926..4c38092 100755
--- a/scripts/generate_messages.py
+++ b/scripts/generate_messages.py
@@ -408,8 +408,13 @@ class CodeGenerator():
             game: Literal['system', 'game'],
             name_snake: str
     ) -> None:
-        out_file.write('    def __init__(\n')
-        out_file.write('            self,\n')
+        comma: str = ''
+        if len(msg['members']) > 0:
+            comma = ',\n'
+        out_file.write( \
+            '    def __init__(\n' \
+            '            self,\n' \
+            f'            chunk_header: ChunkHeader = ChunkHeader(){comma}')
         args: list[str] = []
         for member in msg['members']:
             # {
@@ -440,7 +445,7 @@ class CodeGenerator():
             # {"name": ["mode"], "type": {"kind": "enum", "enum": ["chat"]}},
             elif member['type']['kind'] == 'enum':
                 enum_name: str = name_to_camel(member['type']['enum'])
-                ftype = f'int'
+                ftype = 'int'
                 default = self.get_default_enum7(enum_name)
                 default = f"enum7.{default}.value"
             elif member['type']['kind'] in ('int32', 'tick'):
@@ -529,15 +534,12 @@ class CodeGenerator():
             out_file.write(get_dependencies(msg))
             out_file.write('\n')
             out_file.write(f'class Msg{name_camel}(PrettyPrint):\n')
-            if len(msg['members']) > 0:
-                self.write_init_method_header(out_file, msg, game, name_snake)
-            else:
-                out_file.write('    def __init__(self) -> None:\n')
+            self.write_init_method_header(out_file, msg, game, name_snake)
             out_file.write(f"        self.message_name: str = '{name_snake}'\n")
             sys: str = 'True' if game == 'system' else 'False'
             out_file.write(f"        self.system_message: bool = {sys}\n")
             out_file.write(f"        self.message_id: int = {msg['id']}\n")
-            out_file.write("        self.header: ChunkHeader\n")
+            out_file.write("        self.header: ChunkHeader = chunk_header\n")
             out_file.write('\n')
             for member in msg['members']:
                 # {
diff --git a/twnet_parser/messages7/game/cl_call_vote.py b/twnet_parser/messages7/game/cl_call_vote.py
index caea2b1..c1e9c26 100644
--- a/twnet_parser/messages7/game/cl_call_vote.py
+++ b/twnet_parser/messages7/game/cl_call_vote.py
@@ -8,6 +8,7 @@ from twnet_parser.packer import SANITIZE_CC, pack_int, pack_str
 class MsgClCallVote(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             type: str = 'default',
             value: str = 'default',
             reason: str = 'default',
@@ -16,7 +17,7 @@ class MsgClCallVote(PrettyPrint):
         self.message_name: str = 'cl_call_vote'
         self.system_message: bool = False
         self.message_id: int = 32
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.type: str = type
         self.value: str = value
diff --git a/twnet_parser/messages7/game/cl_command.py b/twnet_parser/messages7/game/cl_command.py
index 1f82479..f98ba40 100644
--- a/twnet_parser/messages7/game/cl_command.py
+++ b/twnet_parser/messages7/game/cl_command.py
@@ -8,13 +8,14 @@ from twnet_parser.packer import SANITIZE_CC, pack_str
 class MsgClCommand(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             name: str = 'default',
             arguments: str = 'default'
     ) -> None:
         self.message_name: str = 'cl_command'
         self.system_message: bool = False
         self.message_id: int = 39
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.name: str = name
         self.arguments: str = arguments
diff --git a/twnet_parser/messages7/game/cl_emoticon.py b/twnet_parser/messages7/game/cl_emoticon.py
index ac595f9..da06316 100644
--- a/twnet_parser/messages7/game/cl_emoticon.py
+++ b/twnet_parser/messages7/game/cl_emoticon.py
@@ -9,12 +9,13 @@ import twnet_parser.enum7 as enum7
 class MsgClEmoticon(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             emoticon: int = enum7.Emoticon.OOP.value
     ) -> None:
         self.message_name: str = 'cl_emoticon'
         self.system_message: bool = False
         self.message_id: int = 30
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.emoticon: int = emoticon
 
diff --git a/twnet_parser/messages7/game/cl_kill.py b/twnet_parser/messages7/game/cl_kill.py
index 87e65a5..3640f5c 100644
--- a/twnet_parser/messages7/game/cl_kill.py
+++ b/twnet_parser/messages7/game/cl_kill.py
@@ -4,11 +4,14 @@ from twnet_parser.pretty_print import PrettyPrint
 from twnet_parser.chunk_header import ChunkHeader
 
 class MsgClKill(PrettyPrint):
-    def __init__(self) -> None:
+    def __init__(
+            self,
+            chunk_header: ChunkHeader = ChunkHeader()
+    ) -> None:
         self.message_name: str = 'cl_kill'
         self.system_message: bool = False
         self.message_id: int = 28
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
 
     # first byte of data
diff --git a/twnet_parser/messages7/game/cl_ready_change.py b/twnet_parser/messages7/game/cl_ready_change.py
index 6b2e363..b236b60 100644
--- a/twnet_parser/messages7/game/cl_ready_change.py
+++ b/twnet_parser/messages7/game/cl_ready_change.py
@@ -4,11 +4,14 @@ from twnet_parser.pretty_print import PrettyPrint
 from twnet_parser.chunk_header import ChunkHeader
 
 class MsgClReadyChange(PrettyPrint):
-    def __init__(self) -> None:
+    def __init__(
+            self,
+            chunk_header: ChunkHeader = ChunkHeader()
+    ) -> None:
         self.message_name: str = 'cl_ready_change'
         self.system_message: bool = False
         self.message_id: int = 29
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
 
     # first byte of data
diff --git a/twnet_parser/messages7/game/cl_say.py b/twnet_parser/messages7/game/cl_say.py
index 84df455..74c621a 100644
--- a/twnet_parser/messages7/game/cl_say.py
+++ b/twnet_parser/messages7/game/cl_say.py
@@ -9,6 +9,7 @@ import twnet_parser.enum7 as enum7
 class MsgClSay(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             mode: int = enum7.Chat.NONE.value,
             target: int = 0,
             message: str = 'default'
@@ -16,7 +17,7 @@ class MsgClSay(PrettyPrint):
         self.message_name: str = 'cl_say'
         self.system_message: bool = False
         self.message_id: int = 24
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.mode: int = mode
         self.target: int = target
diff --git a/twnet_parser/messages7/game/cl_set_spectator_mode.py b/twnet_parser/messages7/game/cl_set_spectator_mode.py
index 6e40fbb..ad9b8fc 100644
--- a/twnet_parser/messages7/game/cl_set_spectator_mode.py
+++ b/twnet_parser/messages7/game/cl_set_spectator_mode.py
@@ -9,13 +9,14 @@ import twnet_parser.enum7 as enum7
 class MsgClSetSpectatorMode(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             spec_mode: int = enum7.Spec.FREEVIEW.value,
             spectator_id: int = 0
     ) -> None:
         self.message_name: str = 'cl_set_spectator_mode'
         self.system_message: bool = False
         self.message_id: int = 26
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.spec_mode: int = spec_mode
         self.spectator_id: int = spectator_id
diff --git a/twnet_parser/messages7/game/cl_set_team.py b/twnet_parser/messages7/game/cl_set_team.py
index b7e2c2c..042c922 100644
--- a/twnet_parser/messages7/game/cl_set_team.py
+++ b/twnet_parser/messages7/game/cl_set_team.py
@@ -9,12 +9,13 @@ import twnet_parser.enum7 as enum7
 class MsgClSetTeam(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             team: int = enum7.Team.SPECTATORS.value
     ) -> None:
         self.message_name: str = 'cl_set_team'
         self.system_message: bool = False
         self.message_id: int = 25
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.team: int = team
 
diff --git a/twnet_parser/messages7/game/cl_skin_change.py b/twnet_parser/messages7/game/cl_skin_change.py
index ec177b0..00234c6 100644
--- a/twnet_parser/messages7/game/cl_skin_change.py
+++ b/twnet_parser/messages7/game/cl_skin_change.py
@@ -9,6 +9,7 @@ from typing import Annotated
 class MsgClSkinChange(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             skin_part_names: Annotated[list[str], 6] = \
                 ['', '', '', '', '', ''],
             use_custom_colors: Annotated[list[bool], 6] = \
@@ -19,7 +20,7 @@ class MsgClSkinChange(PrettyPrint):
         self.message_name: str = 'cl_skin_change'
         self.system_message: bool = False
         self.message_id: int = 34
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.skin_part_names = skin_part_names
         self.use_custom_colors = use_custom_colors
diff --git a/twnet_parser/messages7/game/cl_start_info.py b/twnet_parser/messages7/game/cl_start_info.py
index 60bf55d..230532e 100644
--- a/twnet_parser/messages7/game/cl_start_info.py
+++ b/twnet_parser/messages7/game/cl_start_info.py
@@ -9,6 +9,7 @@ from typing import Annotated
 class MsgClStartInfo(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             name: str = 'default',
             clan: str = 'default',
             country: int = 0,
@@ -22,7 +23,7 @@ class MsgClStartInfo(PrettyPrint):
         self.message_name: str = 'cl_start_info'
         self.system_message: bool = False
         self.message_id: int = 27
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.name: str = name
         self.clan: str = clan
diff --git a/twnet_parser/messages7/game/cl_vote.py b/twnet_parser/messages7/game/cl_vote.py
index 54cb504..e26adda 100644
--- a/twnet_parser/messages7/game/cl_vote.py
+++ b/twnet_parser/messages7/game/cl_vote.py
@@ -8,12 +8,13 @@ from twnet_parser.packer import pack_int
 class MsgClVote(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             vote: int = 0
     ) -> None:
         self.message_name: str = 'cl_vote'
         self.system_message: bool = False
         self.message_id: int = 31
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.vote: int = vote
 
diff --git a/twnet_parser/messages7/game/de_client_enter.py b/twnet_parser/messages7/game/de_client_enter.py
index d1f8cbc..ea3e375 100644
--- a/twnet_parser/messages7/game/de_client_enter.py
+++ b/twnet_parser/messages7/game/de_client_enter.py
@@ -9,6 +9,7 @@ import twnet_parser.enum7 as enum7
 class MsgDeClientEnter(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             name: str = 'default',
             client_id: int = 0,
             team: int = enum7.Team.SPECTATORS.value
@@ -16,7 +17,7 @@ class MsgDeClientEnter(PrettyPrint):
         self.message_name: str = 'de_client_enter'
         self.system_message: bool = False
         self.message_id: int = 22
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.name: str = name
         self.client_id: int = client_id
diff --git a/twnet_parser/messages7/game/de_client_leave.py b/twnet_parser/messages7/game/de_client_leave.py
index 2708d13..dd80ce3 100644
--- a/twnet_parser/messages7/game/de_client_leave.py
+++ b/twnet_parser/messages7/game/de_client_leave.py
@@ -8,6 +8,7 @@ from twnet_parser.packer import SANITIZE_CC, pack_int, pack_str
 class MsgDeClientLeave(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             name: str = 'default',
             client_id: int = 0,
             reason: str = 'default'
@@ -15,7 +16,7 @@ class MsgDeClientLeave(PrettyPrint):
         self.message_name: str = 'de_client_leave'
         self.system_message: bool = False
         self.message_id: int = 23
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.name: str = name
         self.client_id: int = client_id
diff --git a/twnet_parser/messages7/game/sv_broadcast.py b/twnet_parser/messages7/game/sv_broadcast.py
index 9a77d6a..1b414d2 100644
--- a/twnet_parser/messages7/game/sv_broadcast.py
+++ b/twnet_parser/messages7/game/sv_broadcast.py
@@ -8,12 +8,13 @@ from twnet_parser.packer import pack_str
 class MsgSvBroadcast(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             message: str = 'default'
     ) -> None:
         self.message_name: str = 'sv_broadcast'
         self.system_message: bool = False
         self.message_id: int = 2
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.message: str = message
 
diff --git a/twnet_parser/messages7/game/sv_chat.py b/twnet_parser/messages7/game/sv_chat.py
index 356d353..932f007 100644
--- a/twnet_parser/messages7/game/sv_chat.py
+++ b/twnet_parser/messages7/game/sv_chat.py
@@ -9,6 +9,7 @@ import twnet_parser.enum7 as enum7
 class MsgSvChat(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             mode: int = enum7.Chat.NONE.value,
             client_id: int = 0,
             target_id: int = 0,
@@ -17,7 +18,7 @@ class MsgSvChat(PrettyPrint):
         self.message_name: str = 'sv_chat'
         self.system_message: bool = False
         self.message_id: int = 3
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.mode: int = mode
         self.client_id: int = client_id
diff --git a/twnet_parser/messages7/game/sv_checkpoint.py b/twnet_parser/messages7/game/sv_checkpoint.py
index 0bd8f5c..96f67ef 100644
--- a/twnet_parser/messages7/game/sv_checkpoint.py
+++ b/twnet_parser/messages7/game/sv_checkpoint.py
@@ -8,12 +8,13 @@ from twnet_parser.packer import pack_int
 class MsgSvCheckpoint(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             diff: int = 0
     ) -> None:
         self.message_name: str = 'sv_checkpoint'
         self.system_message: bool = False
         self.message_id: int = 36
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.diff: int = diff
 
diff --git a/twnet_parser/messages7/game/sv_client_drop.py b/twnet_parser/messages7/game/sv_client_drop.py
index 64f5ee7..2cc1601 100644
--- a/twnet_parser/messages7/game/sv_client_drop.py
+++ b/twnet_parser/messages7/game/sv_client_drop.py
@@ -8,6 +8,7 @@ from twnet_parser.packer import SANITIZE_CC, pack_int, pack_str
 class MsgSvClientDrop(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             client_id: int = 0,
             reason: str = 'default',
             silent: bool = False
@@ -15,7 +16,7 @@ class MsgSvClientDrop(PrettyPrint):
         self.message_name: str = 'sv_client_drop'
         self.system_message: bool = False
         self.message_id: int = 20
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.client_id: int = client_id
         self.reason: str = reason
diff --git a/twnet_parser/messages7/game/sv_client_info.py b/twnet_parser/messages7/game/sv_client_info.py
index 59628a7..6c33826 100644
--- a/twnet_parser/messages7/game/sv_client_info.py
+++ b/twnet_parser/messages7/game/sv_client_info.py
@@ -10,6 +10,7 @@ import twnet_parser.enum7 as enum7
 class MsgSvClientInfo(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             client_id: int = 0,
             local: bool = False,
             team: int = enum7.Team.SPECTATORS.value,
@@ -27,7 +28,7 @@ class MsgSvClientInfo(PrettyPrint):
         self.message_name: str = 'sv_client_info'
         self.system_message: bool = False
         self.message_id: int = 18
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.client_id: int = client_id
         self.local: bool = local
diff --git a/twnet_parser/messages7/game/sv_command_info.py b/twnet_parser/messages7/game/sv_command_info.py
index b9698ba..6016c79 100644
--- a/twnet_parser/messages7/game/sv_command_info.py
+++ b/twnet_parser/messages7/game/sv_command_info.py
@@ -8,6 +8,7 @@ from twnet_parser.packer import SANITIZE_CC, pack_str
 class MsgSvCommandInfo(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             name: str = 'default',
             args_format: str = 'default',
             help_text: str = 'default'
@@ -15,7 +16,7 @@ class MsgSvCommandInfo(PrettyPrint):
         self.message_name: str = 'sv_command_info'
         self.system_message: bool = False
         self.message_id: int = 37
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.name: str = name
         self.args_format: str = args_format
diff --git a/twnet_parser/messages7/game/sv_command_info_remove.py b/twnet_parser/messages7/game/sv_command_info_remove.py
index 28cbca8..3c3ed99 100644
--- a/twnet_parser/messages7/game/sv_command_info_remove.py
+++ b/twnet_parser/messages7/game/sv_command_info_remove.py
@@ -8,12 +8,13 @@ from twnet_parser.packer import SANITIZE_CC, pack_str
 class MsgSvCommandInfoRemove(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             name: str = 'default'
     ) -> None:
         self.message_name: str = 'sv_command_info_remove'
         self.system_message: bool = False
         self.message_id: int = 38
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.name: str = name
 
diff --git a/twnet_parser/messages7/game/sv_emoticon.py b/twnet_parser/messages7/game/sv_emoticon.py
index 6dde997..4db3688 100644
--- a/twnet_parser/messages7/game/sv_emoticon.py
+++ b/twnet_parser/messages7/game/sv_emoticon.py
@@ -9,13 +9,14 @@ import twnet_parser.enum7 as enum7
 class MsgSvEmoticon(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             client_id: int = 0,
             emoticon: int = enum7.Emoticon.OOP.value
     ) -> None:
         self.message_name: str = 'sv_emoticon'
         self.system_message: bool = False
         self.message_id: int = 10
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.client_id: int = client_id
         self.emoticon: int = emoticon
diff --git a/twnet_parser/messages7/game/sv_extra_projectile.py b/twnet_parser/messages7/game/sv_extra_projectile.py
index 762772d..7bc4ac0 100644
--- a/twnet_parser/messages7/game/sv_extra_projectile.py
+++ b/twnet_parser/messages7/game/sv_extra_projectile.py
@@ -8,12 +8,13 @@ from twnet_parser.packer import pack_int
 class MsgSvExtraProjectile(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             projectile: int = 0
     ) -> None:
         self.message_name: str = 'sv_extra_projectile'
         self.system_message: bool = False
         self.message_id: int = 7
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.projectile: int = projectile
 
diff --git a/twnet_parser/messages7/game/sv_game_info.py b/twnet_parser/messages7/game/sv_game_info.py
index 250a045..25e4028 100644
--- a/twnet_parser/messages7/game/sv_game_info.py
+++ b/twnet_parser/messages7/game/sv_game_info.py
@@ -8,6 +8,7 @@ from twnet_parser.packer import pack_int
 class MsgSvGameInfo(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             game_flags: int = 0,
             score_limit: int = 0,
             time_limit: int = 0,
@@ -17,7 +18,7 @@ class MsgSvGameInfo(PrettyPrint):
         self.message_name: str = 'sv_game_info'
         self.system_message: bool = False
         self.message_id: int = 19
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.game_flags: int = game_flags
         self.score_limit: int = score_limit
diff --git a/twnet_parser/messages7/game/sv_game_msg.py b/twnet_parser/messages7/game/sv_game_msg.py
index ba8ebf7..ec1bc22 100644
--- a/twnet_parser/messages7/game/sv_game_msg.py
+++ b/twnet_parser/messages7/game/sv_game_msg.py
@@ -4,11 +4,14 @@ from twnet_parser.pretty_print import PrettyPrint
 from twnet_parser.chunk_header import ChunkHeader
 
 class MsgSvGameMsg(PrettyPrint):
-    def __init__(self) -> None:
+    def __init__(
+            self,
+            chunk_header: ChunkHeader = ChunkHeader()
+    ) -> None:
         self.message_name: str = 'sv_game_msg'
         self.system_message: bool = False
         self.message_id: int = 21
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
 
     # first byte of data
diff --git a/twnet_parser/messages7/game/sv_kill_msg.py b/twnet_parser/messages7/game/sv_kill_msg.py
index f80abeb..e97fee3 100644
--- a/twnet_parser/messages7/game/sv_kill_msg.py
+++ b/twnet_parser/messages7/game/sv_kill_msg.py
@@ -8,6 +8,7 @@ from twnet_parser.packer import pack_int
 class MsgSvKillMsg(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             killer: int = 0,
             victim: int = 0,
             weapon: int = 0,
@@ -16,7 +17,7 @@ class MsgSvKillMsg(PrettyPrint):
         self.message_name: str = 'sv_kill_msg'
         self.system_message: bool = False
         self.message_id: int = 5
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.killer: int = killer
         self.victim: int = victim
diff --git a/twnet_parser/messages7/game/sv_motd.py b/twnet_parser/messages7/game/sv_motd.py
index 621af27..bc6205c 100644
--- a/twnet_parser/messages7/game/sv_motd.py
+++ b/twnet_parser/messages7/game/sv_motd.py
@@ -8,12 +8,13 @@ from twnet_parser.packer import pack_str
 class MsgSvMotd(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             message: str = 'default'
     ) -> None:
         self.message_name: str = 'sv_motd'
         self.system_message: bool = False
         self.message_id: int = 1
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.message: str = message
 
diff --git a/twnet_parser/messages7/game/sv_race_finish.py b/twnet_parser/messages7/game/sv_race_finish.py
index bf4d76a..d3f9f2d 100644
--- a/twnet_parser/messages7/game/sv_race_finish.py
+++ b/twnet_parser/messages7/game/sv_race_finish.py
@@ -8,6 +8,7 @@ from twnet_parser.packer import pack_int
 class MsgSvRaceFinish(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             client_id: int = 0,
             time: int = 0,
             diff: int = 0,
@@ -17,7 +18,7 @@ class MsgSvRaceFinish(PrettyPrint):
         self.message_name: str = 'sv_race_finish'
         self.system_message: bool = False
         self.message_id: int = 35
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.client_id: int = client_id
         self.time: int = time
diff --git a/twnet_parser/messages7/game/sv_ready_to_enter.py b/twnet_parser/messages7/game/sv_ready_to_enter.py
index 70fa08a..23527ca 100644
--- a/twnet_parser/messages7/game/sv_ready_to_enter.py
+++ b/twnet_parser/messages7/game/sv_ready_to_enter.py
@@ -4,11 +4,14 @@ from twnet_parser.pretty_print import PrettyPrint
 from twnet_parser.chunk_header import ChunkHeader
 
 class MsgSvReadyToEnter(PrettyPrint):
-    def __init__(self) -> None:
+    def __init__(
+            self,
+            chunk_header: ChunkHeader = ChunkHeader()
+    ) -> None:
         self.message_name: str = 'sv_ready_to_enter'
         self.system_message: bool = False
         self.message_id: int = 8
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
 
     # first byte of data
diff --git a/twnet_parser/messages7/game/sv_server_settings.py b/twnet_parser/messages7/game/sv_server_settings.py
index 344d65c..5ddb82c 100644
--- a/twnet_parser/messages7/game/sv_server_settings.py
+++ b/twnet_parser/messages7/game/sv_server_settings.py
@@ -8,6 +8,7 @@ from twnet_parser.packer import pack_int
 class MsgSvServerSettings(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             kick_vote: bool = False,
             kick_min: int = 0,
             spec_vote: bool = False,
@@ -18,7 +19,7 @@ class MsgSvServerSettings(PrettyPrint):
         self.message_name: str = 'sv_server_settings'
         self.system_message: bool = False
         self.message_id: int = 17
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.kick_vote: bool = kick_vote
         self.kick_min: int = kick_min
diff --git a/twnet_parser/messages7/game/sv_skin_change.py b/twnet_parser/messages7/game/sv_skin_change.py
index 37d18d6..57249b0 100644
--- a/twnet_parser/messages7/game/sv_skin_change.py
+++ b/twnet_parser/messages7/game/sv_skin_change.py
@@ -9,6 +9,7 @@ from typing import Annotated
 class MsgSvSkinChange(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             client_id: int = 0,
             skin_part_names: Annotated[list[str], 6] = \
                 ['', '', '', '', '', ''],
@@ -20,7 +21,7 @@ class MsgSvSkinChange(PrettyPrint):
         self.message_name: str = 'sv_skin_change'
         self.system_message: bool = False
         self.message_id: int = 33
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.client_id: int = client_id
         self.skin_part_names = skin_part_names
diff --git a/twnet_parser/messages7/game/sv_team.py b/twnet_parser/messages7/game/sv_team.py
index 59bcdec..e374d07 100644
--- a/twnet_parser/messages7/game/sv_team.py
+++ b/twnet_parser/messages7/game/sv_team.py
@@ -9,6 +9,7 @@ import twnet_parser.enum7 as enum7
 class MsgSvTeam(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             client_id: int = 0,
             team: int = enum7.Team.SPECTATORS.value,
             silent: bool = False,
@@ -17,7 +18,7 @@ class MsgSvTeam(PrettyPrint):
         self.message_name: str = 'sv_team'
         self.system_message: bool = False
         self.message_id: int = 4
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.client_id: int = client_id
         self.team: int = team
diff --git a/twnet_parser/messages7/game/sv_tune_params.py b/twnet_parser/messages7/game/sv_tune_params.py
index 69d6159..b88943c 100644
--- a/twnet_parser/messages7/game/sv_tune_params.py
+++ b/twnet_parser/messages7/game/sv_tune_params.py
@@ -8,6 +8,7 @@ from twnet_parser.packer import pack_int
 class MsgSvTuneParams(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             ground_control_speed: float = 10,
             ground_control_accel: float = 2,
             ground_friction: float = 0.5,
@@ -44,7 +45,7 @@ class MsgSvTuneParams(PrettyPrint):
         self.message_name: str = 'sv_tune_params'
         self.system_message: bool = False
         self.message_id: int = 6
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.ground_control_speed: float = ground_control_speed
         self.ground_control_accel: float = ground_control_accel
diff --git a/twnet_parser/messages7/game/sv_vote_clear_options.py b/twnet_parser/messages7/game/sv_vote_clear_options.py
index e83e57d..a42c936 100644
--- a/twnet_parser/messages7/game/sv_vote_clear_options.py
+++ b/twnet_parser/messages7/game/sv_vote_clear_options.py
@@ -4,11 +4,14 @@ from twnet_parser.pretty_print import PrettyPrint
 from twnet_parser.chunk_header import ChunkHeader
 
 class MsgSvVoteClearOptions(PrettyPrint):
-    def __init__(self) -> None:
+    def __init__(
+            self,
+            chunk_header: ChunkHeader = ChunkHeader()
+    ) -> None:
         self.message_name: str = 'sv_vote_clear_options'
         self.system_message: bool = False
         self.message_id: int = 11
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
 
     # first byte of data
diff --git a/twnet_parser/messages7/game/sv_vote_option_add.py b/twnet_parser/messages7/game/sv_vote_option_add.py
index ade0d1f..055cbbc 100644
--- a/twnet_parser/messages7/game/sv_vote_option_add.py
+++ b/twnet_parser/messages7/game/sv_vote_option_add.py
@@ -8,12 +8,13 @@ from twnet_parser.packer import SANITIZE_CC, pack_str
 class MsgSvVoteOptionAdd(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             description: str = 'default'
     ) -> None:
         self.message_name: str = 'sv_vote_option_add'
         self.system_message: bool = False
         self.message_id: int = 13
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.description: str = description
 
diff --git a/twnet_parser/messages7/game/sv_vote_option_list_add.py b/twnet_parser/messages7/game/sv_vote_option_list_add.py
index 60fb521..9265e40 100644
--- a/twnet_parser/messages7/game/sv_vote_option_list_add.py
+++ b/twnet_parser/messages7/game/sv_vote_option_list_add.py
@@ -4,11 +4,14 @@ from twnet_parser.pretty_print import PrettyPrint
 from twnet_parser.chunk_header import ChunkHeader
 
 class MsgSvVoteOptionListAdd(PrettyPrint):
-    def __init__(self) -> None:
+    def __init__(
+            self,
+            chunk_header: ChunkHeader = ChunkHeader()
+    ) -> None:
         self.message_name: str = 'sv_vote_option_list_add'
         self.system_message: bool = False
         self.message_id: int = 12
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
 
     # first byte of data
diff --git a/twnet_parser/messages7/game/sv_vote_option_remove.py b/twnet_parser/messages7/game/sv_vote_option_remove.py
index 7246746..f2c2d76 100644
--- a/twnet_parser/messages7/game/sv_vote_option_remove.py
+++ b/twnet_parser/messages7/game/sv_vote_option_remove.py
@@ -8,12 +8,13 @@ from twnet_parser.packer import SANITIZE_CC, pack_str
 class MsgSvVoteOptionRemove(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             description: str = 'default'
     ) -> None:
         self.message_name: str = 'sv_vote_option_remove'
         self.system_message: bool = False
         self.message_id: int = 14
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.description: str = description
 
diff --git a/twnet_parser/messages7/game/sv_vote_set.py b/twnet_parser/messages7/game/sv_vote_set.py
index be0cdc8..d63c5bd 100644
--- a/twnet_parser/messages7/game/sv_vote_set.py
+++ b/twnet_parser/messages7/game/sv_vote_set.py
@@ -9,6 +9,7 @@ import twnet_parser.enum7 as enum7
 class MsgSvVoteSet(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             client_id: int = 0,
             type: int = enum7.Vote.UNKNOWN.value,
             timeout: int = 0,
@@ -18,7 +19,7 @@ class MsgSvVoteSet(PrettyPrint):
         self.message_name: str = 'sv_vote_set'
         self.system_message: bool = False
         self.message_id: int = 15
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.client_id: int = client_id
         self.type: int = type
diff --git a/twnet_parser/messages7/game/sv_vote_status.py b/twnet_parser/messages7/game/sv_vote_status.py
index 5d2e3c9..4e01999 100644
--- a/twnet_parser/messages7/game/sv_vote_status.py
+++ b/twnet_parser/messages7/game/sv_vote_status.py
@@ -8,6 +8,7 @@ from twnet_parser.packer import pack_int
 class MsgSvVoteStatus(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             yes: int = 0,
             no: int = 0,
             pass_: int = 0,
@@ -16,7 +17,7 @@ class MsgSvVoteStatus(PrettyPrint):
         self.message_name: str = 'sv_vote_status'
         self.system_message: bool = False
         self.message_id: int = 16
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.yes: int = yes
         self.no: int = no
diff --git a/twnet_parser/messages7/game/sv_weapon_pickup.py b/twnet_parser/messages7/game/sv_weapon_pickup.py
index 3520e16..f172a3f 100644
--- a/twnet_parser/messages7/game/sv_weapon_pickup.py
+++ b/twnet_parser/messages7/game/sv_weapon_pickup.py
@@ -9,12 +9,13 @@ import twnet_parser.enum7 as enum7
 class MsgSvWeaponPickup(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             weapon: int = enum7.Weapon.HAMMER.value
     ) -> None:
         self.message_name: str = 'sv_weapon_pickup'
         self.system_message: bool = False
         self.message_id: int = 9
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.weapon: int = weapon
 
diff --git a/twnet_parser/messages7/system/con_ready.py b/twnet_parser/messages7/system/con_ready.py
index a3ff5db..474ce87 100644
--- a/twnet_parser/messages7/system/con_ready.py
+++ b/twnet_parser/messages7/system/con_ready.py
@@ -4,11 +4,14 @@ from twnet_parser.pretty_print import PrettyPrint
 from twnet_parser.chunk_header import ChunkHeader
 
 class MsgConReady(PrettyPrint):
-    def __init__(self) -> None:
+    def __init__(
+            self,
+            chunk_header: ChunkHeader = ChunkHeader()
+    ) -> None:
         self.message_name: str = 'con_ready'
         self.system_message: bool = True
         self.message_id: int = 5
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
 
     # first byte of data
diff --git a/twnet_parser/messages7/system/enter_game.py b/twnet_parser/messages7/system/enter_game.py
index d921c70..5df0f96 100644
--- a/twnet_parser/messages7/system/enter_game.py
+++ b/twnet_parser/messages7/system/enter_game.py
@@ -4,11 +4,14 @@ from twnet_parser.pretty_print import PrettyPrint
 from twnet_parser.chunk_header import ChunkHeader
 
 class MsgEnterGame(PrettyPrint):
-    def __init__(self) -> None:
+    def __init__(
+            self,
+            chunk_header: ChunkHeader = ChunkHeader()
+    ) -> None:
         self.message_name: str = 'enter_game'
         self.system_message: bool = True
         self.message_id: int = 19
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
 
     # first byte of data
diff --git a/twnet_parser/messages7/system/info.py b/twnet_parser/messages7/system/info.py
index 7871844..4ce126d 100644
--- a/twnet_parser/messages7/system/info.py
+++ b/twnet_parser/messages7/system/info.py
@@ -8,6 +8,7 @@ from twnet_parser.packer import pack_int, pack_str
 class MsgInfo(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             version: str = 'default',
             password: str = '',
             client_version: int = 0
@@ -15,7 +16,7 @@ class MsgInfo(PrettyPrint):
         self.message_name: str = 'info'
         self.system_message: bool = True
         self.message_id: int = 1
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.version: str = version
         self.password: str = password
diff --git a/twnet_parser/messages7/system/input.py b/twnet_parser/messages7/system/input.py
index cb989af..a9aa790 100644
--- a/twnet_parser/messages7/system/input.py
+++ b/twnet_parser/messages7/system/input.py
@@ -8,6 +8,7 @@ from twnet_parser.packer import pack_int
 class MsgInput(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             ack_snapshot: int = 0,
             intended_tick: int = 0,
             input_size: int = 0,
@@ -16,7 +17,7 @@ class MsgInput(PrettyPrint):
         self.message_name: str = 'input'
         self.system_message: bool = True
         self.message_id: int = 20
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.ack_snapshot: int = ack_snapshot
         self.intended_tick: int = intended_tick
diff --git a/twnet_parser/messages7/system/input_timing.py b/twnet_parser/messages7/system/input_timing.py
index cd7f039..3e75431 100644
--- a/twnet_parser/messages7/system/input_timing.py
+++ b/twnet_parser/messages7/system/input_timing.py
@@ -8,13 +8,14 @@ from twnet_parser.packer import pack_int
 class MsgInputTiming(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             input_pred_tick: int = 0,
             time_left: int = 0
     ) -> None:
         self.message_name: str = 'input_timing'
         self.system_message: bool = True
         self.message_id: int = 10
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.input_pred_tick: int = input_pred_tick
         self.time_left: int = time_left
diff --git a/twnet_parser/messages7/system/map_change.py b/twnet_parser/messages7/system/map_change.py
index 68068c0..b8568d0 100644
--- a/twnet_parser/messages7/system/map_change.py
+++ b/twnet_parser/messages7/system/map_change.py
@@ -9,6 +9,7 @@ from typing import Annotated
 class MsgMapChange(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             name: str = 'default',
             crc: int = 0,
             size: int = 0,
@@ -19,7 +20,7 @@ class MsgMapChange(PrettyPrint):
         self.message_name: str = 'map_change'
         self.system_message: bool = True
         self.message_id: int = 2
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.name: str = name
         self.crc: int = crc
diff --git a/twnet_parser/messages7/system/map_data.py b/twnet_parser/messages7/system/map_data.py
index 283051e..8ae20c6 100644
--- a/twnet_parser/messages7/system/map_data.py
+++ b/twnet_parser/messages7/system/map_data.py
@@ -7,12 +7,13 @@ from twnet_parser.chunk_header import ChunkHeader
 class MsgMapData(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             data: bytes = b'\x00'
     ) -> None:
         self.message_name: str = 'map_data'
         self.system_message: bool = True
         self.message_id: int = 3
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.data: bytes = data
 
diff --git a/twnet_parser/messages7/system/maplist_entry_add.py b/twnet_parser/messages7/system/maplist_entry_add.py
index dda963d..7df821a 100644
--- a/twnet_parser/messages7/system/maplist_entry_add.py
+++ b/twnet_parser/messages7/system/maplist_entry_add.py
@@ -8,12 +8,13 @@ from twnet_parser.packer import pack_str
 class MsgMaplistEntryAdd(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             name: str = 'default'
     ) -> None:
         self.message_name: str = 'maplist_entry_add'
         self.system_message: bool = True
         self.message_id: int = 29
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.name: str = name
 
diff --git a/twnet_parser/messages7/system/maplist_entry_rem.py b/twnet_parser/messages7/system/maplist_entry_rem.py
index 3f1f115..f98567d 100644
--- a/twnet_parser/messages7/system/maplist_entry_rem.py
+++ b/twnet_parser/messages7/system/maplist_entry_rem.py
@@ -8,12 +8,13 @@ from twnet_parser.packer import pack_str
 class MsgMaplistEntryRem(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             name: str = 'default'
     ) -> None:
         self.message_name: str = 'maplist_entry_rem'
         self.system_message: bool = True
         self.message_id: int = 30
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.name: str = name
 
diff --git a/twnet_parser/messages7/system/ping.py b/twnet_parser/messages7/system/ping.py
index ddf748d..4649570 100644
--- a/twnet_parser/messages7/system/ping.py
+++ b/twnet_parser/messages7/system/ping.py
@@ -4,11 +4,14 @@ from twnet_parser.pretty_print import PrettyPrint
 from twnet_parser.chunk_header import ChunkHeader
 
 class MsgPing(PrettyPrint):
-    def __init__(self) -> None:
+    def __init__(
+            self,
+            chunk_header: ChunkHeader = ChunkHeader()
+    ) -> None:
         self.message_name: str = 'ping'
         self.system_message: bool = True
         self.message_id: int = 26
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
 
     # first byte of data
diff --git a/twnet_parser/messages7/system/ping_reply.py b/twnet_parser/messages7/system/ping_reply.py
index 356f1d8..9565eb5 100644
--- a/twnet_parser/messages7/system/ping_reply.py
+++ b/twnet_parser/messages7/system/ping_reply.py
@@ -4,11 +4,14 @@ from twnet_parser.pretty_print import PrettyPrint
 from twnet_parser.chunk_header import ChunkHeader
 
 class MsgPingReply(PrettyPrint):
-    def __init__(self) -> None:
+    def __init__(
+            self,
+            chunk_header: ChunkHeader = ChunkHeader()
+    ) -> None:
         self.message_name: str = 'ping_reply'
         self.system_message: bool = True
         self.message_id: int = 27
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
 
     # first byte of data
diff --git a/twnet_parser/messages7/system/rcon_auth.py b/twnet_parser/messages7/system/rcon_auth.py
index ce41b6a..aa3372c 100644
--- a/twnet_parser/messages7/system/rcon_auth.py
+++ b/twnet_parser/messages7/system/rcon_auth.py
@@ -8,12 +8,13 @@ from twnet_parser.packer import pack_str
 class MsgRconAuth(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             password: str = 'default'
     ) -> None:
         self.message_name: str = 'rcon_auth'
         self.system_message: bool = True
         self.message_id: int = 22
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.password: str = password
 
diff --git a/twnet_parser/messages7/system/rcon_auth_off.py b/twnet_parser/messages7/system/rcon_auth_off.py
index 7e6ab12..98cfbec 100644
--- a/twnet_parser/messages7/system/rcon_auth_off.py
+++ b/twnet_parser/messages7/system/rcon_auth_off.py
@@ -4,11 +4,14 @@ from twnet_parser.pretty_print import PrettyPrint
 from twnet_parser.chunk_header import ChunkHeader
 
 class MsgRconAuthOff(PrettyPrint):
-    def __init__(self) -> None:
+    def __init__(
+            self,
+            chunk_header: ChunkHeader = ChunkHeader()
+    ) -> None:
         self.message_name: str = 'rcon_auth_off'
         self.system_message: bool = True
         self.message_id: int = 12
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
 
     # first byte of data
diff --git a/twnet_parser/messages7/system/rcon_auth_on.py b/twnet_parser/messages7/system/rcon_auth_on.py
index fd14fb5..cce3c58 100644
--- a/twnet_parser/messages7/system/rcon_auth_on.py
+++ b/twnet_parser/messages7/system/rcon_auth_on.py
@@ -4,11 +4,14 @@ from twnet_parser.pretty_print import PrettyPrint
 from twnet_parser.chunk_header import ChunkHeader
 
 class MsgRconAuthOn(PrettyPrint):
-    def __init__(self) -> None:
+    def __init__(
+            self,
+            chunk_header: ChunkHeader = ChunkHeader()
+    ) -> None:
         self.message_name: str = 'rcon_auth_on'
         self.system_message: bool = True
         self.message_id: int = 11
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
 
     # first byte of data
diff --git a/twnet_parser/messages7/system/rcon_cmd.py b/twnet_parser/messages7/system/rcon_cmd.py
index 3d4184e..345c163 100644
--- a/twnet_parser/messages7/system/rcon_cmd.py
+++ b/twnet_parser/messages7/system/rcon_cmd.py
@@ -8,12 +8,13 @@ from twnet_parser.packer import pack_str
 class MsgRconCmd(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             cmd: str = 'default'
     ) -> None:
         self.message_name: str = 'rcon_cmd'
         self.system_message: bool = True
         self.message_id: int = 21
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.cmd: str = cmd
 
diff --git a/twnet_parser/messages7/system/rcon_cmd_add.py b/twnet_parser/messages7/system/rcon_cmd_add.py
index 65208b6..836aa80 100644
--- a/twnet_parser/messages7/system/rcon_cmd_add.py
+++ b/twnet_parser/messages7/system/rcon_cmd_add.py
@@ -8,6 +8,7 @@ from twnet_parser.packer import pack_str
 class MsgRconCmdAdd(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             name: str = 'default',
             help: str = 'default',
             params: str = 'default'
@@ -15,7 +16,7 @@ class MsgRconCmdAdd(PrettyPrint):
         self.message_name: str = 'rcon_cmd_add'
         self.system_message: bool = True
         self.message_id: int = 14
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.name: str = name
         self.help: str = help
diff --git a/twnet_parser/messages7/system/rcon_cmd_rem.py b/twnet_parser/messages7/system/rcon_cmd_rem.py
index ea848df..39225cb 100644
--- a/twnet_parser/messages7/system/rcon_cmd_rem.py
+++ b/twnet_parser/messages7/system/rcon_cmd_rem.py
@@ -8,12 +8,13 @@ from twnet_parser.packer import pack_str
 class MsgRconCmdRem(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             name: str = 'default'
     ) -> None:
         self.message_name: str = 'rcon_cmd_rem'
         self.system_message: bool = True
         self.message_id: int = 15
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.name: str = name
 
diff --git a/twnet_parser/messages7/system/rcon_line.py b/twnet_parser/messages7/system/rcon_line.py
index d48c20d..17170e9 100644
--- a/twnet_parser/messages7/system/rcon_line.py
+++ b/twnet_parser/messages7/system/rcon_line.py
@@ -8,12 +8,13 @@ from twnet_parser.packer import pack_str
 class MsgRconLine(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             line: str = 'default'
     ) -> None:
         self.message_name: str = 'rcon_line'
         self.system_message: bool = True
         self.message_id: int = 13
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.line: str = line
 
diff --git a/twnet_parser/messages7/system/ready.py b/twnet_parser/messages7/system/ready.py
index 0d33545..6c1dcd3 100644
--- a/twnet_parser/messages7/system/ready.py
+++ b/twnet_parser/messages7/system/ready.py
@@ -4,11 +4,14 @@ from twnet_parser.pretty_print import PrettyPrint
 from twnet_parser.chunk_header import ChunkHeader
 
 class MsgReady(PrettyPrint):
-    def __init__(self) -> None:
+    def __init__(
+            self,
+            chunk_header: ChunkHeader = ChunkHeader()
+    ) -> None:
         self.message_name: str = 'ready'
         self.system_message: bool = True
         self.message_id: int = 18
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
 
     # first byte of data
diff --git a/twnet_parser/messages7/system/request_map_data.py b/twnet_parser/messages7/system/request_map_data.py
index e40a786..0b2c95f 100644
--- a/twnet_parser/messages7/system/request_map_data.py
+++ b/twnet_parser/messages7/system/request_map_data.py
@@ -4,11 +4,14 @@ from twnet_parser.pretty_print import PrettyPrint
 from twnet_parser.chunk_header import ChunkHeader
 
 class MsgRequestMapData(PrettyPrint):
-    def __init__(self) -> None:
+    def __init__(
+            self,
+            chunk_header: ChunkHeader = ChunkHeader()
+    ) -> None:
         self.message_name: str = 'request_map_data'
         self.system_message: bool = True
         self.message_id: int = 23
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
 
     # first byte of data
diff --git a/twnet_parser/messages7/system/server_info.py b/twnet_parser/messages7/system/server_info.py
index b1ed81d..0fd391b 100644
--- a/twnet_parser/messages7/system/server_info.py
+++ b/twnet_parser/messages7/system/server_info.py
@@ -7,12 +7,13 @@ from twnet_parser.chunk_header import ChunkHeader
 class MsgServerInfo(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             data: bytes = b'\x00'
     ) -> None:
         self.message_name: str = 'server_info'
         self.system_message: bool = True
         self.message_id: int = 4
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.data: bytes = data
 
diff --git a/twnet_parser/messages7/system/snap.py b/twnet_parser/messages7/system/snap.py
index 2fc79ff..4a1ce4c 100644
--- a/twnet_parser/messages7/system/snap.py
+++ b/twnet_parser/messages7/system/snap.py
@@ -9,6 +9,7 @@ from typing import Optional
 class MsgSnap(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             tick: int = 0,
             delta_tick: int = 0,
             num_parts: int = 0,
@@ -20,7 +21,7 @@ class MsgSnap(PrettyPrint):
         self.message_name: str = 'snap'
         self.system_message: bool = True
         self.message_id: int = 6
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.tick: int = tick
         self.delta_tick: int = delta_tick
diff --git a/twnet_parser/messages7/system/snap_empty.py b/twnet_parser/messages7/system/snap_empty.py
index d34d627..8bc7543 100644
--- a/twnet_parser/messages7/system/snap_empty.py
+++ b/twnet_parser/messages7/system/snap_empty.py
@@ -8,13 +8,14 @@ from twnet_parser.packer import pack_int
 class MsgSnapEmpty(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             tick: int = 0,
             delta_tick: int = 0
     ) -> None:
         self.message_name: str = 'snap_empty'
         self.system_message: bool = True
         self.message_id: int = 7
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.tick: int = tick
         self.delta_tick: int = delta_tick
diff --git a/twnet_parser/messages7/system/snap_single.py b/twnet_parser/messages7/system/snap_single.py
index 925a0e1..116904c 100644
--- a/twnet_parser/messages7/system/snap_single.py
+++ b/twnet_parser/messages7/system/snap_single.py
@@ -9,6 +9,7 @@ from typing import Optional
 class MsgSnapSingle(PrettyPrint):
     def __init__(
             self,
+            chunk_header: ChunkHeader = ChunkHeader(),
             tick: int = 0,
             delta_tick: int = 0,
             crc: int = 0,
@@ -18,7 +19,7 @@ class MsgSnapSingle(PrettyPrint):
         self.message_name: str = 'snap_single'
         self.system_message: bool = True
         self.message_id: int = 8
-        self.header: ChunkHeader
+        self.header: ChunkHeader = chunk_header
 
         self.tick: int = tick
         self.delta_tick: int = delta_tick