diff --git a/Cargo.lock b/Cargo.lock
index 402777f..56fb407 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1151,9 +1151,9 @@ dependencies = [
 
 [[package]]
 name = "moka"
-version = "0.12.0"
+version = "0.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8dc65d4615c08c8a13d91fd404b5a2a4485ba35b4091e3315cf8798d280c2f29"
+checksum = "d8017ec3548ffe7d4cef7ac0e12b044c01164a74c0f3119420faeaf13490ad8b"
 dependencies = [
  "async-lock",
  "async-trait",
@@ -1606,9 +1606,9 @@ checksum = "dbb5fb1acd8a1a18b3dd5be62d25485eb770e05afb408a9627d14d451bae12da"
 
 [[package]]
 name = "reqwest"
-version = "0.11.20"
+version = "0.11.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3e9ad3fe7488d7e34558a2033d45a0c90b72d97b4f80705666fea71472e2e6a1"
+checksum = "046cd98826c46c2ac8ddecae268eb5c2e58628688a5fc7a2643704a73faba95b"
 dependencies = [
  "base64",
  "bytes",
@@ -1631,6 +1631,7 @@ dependencies = [
  "serde",
  "serde_json",
  "serde_urlencoded",
+ "system-configuration",
  "tokio",
  "tokio-native-tls",
  "tower-service",
@@ -2254,6 +2255,27 @@ version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2047c6ded9c721764247e62cd3b03c09ffc529b2ba5b10ec482ae507a4a70160"
 
+[[package]]
+name = "system-configuration"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ba3a3adc5c275d719af8cb4272ea1c4a6d668a777f37e115f6d11ddbc1c8e0e7"
+dependencies = [
+ "bitflags 1.3.2",
+ "core-foundation",
+ "system-configuration-sys",
+]
+
+[[package]]
+name = "system-configuration-sys"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a75fb188eb626b924683e3b95e3a48e63551fcfb51949de2f06a9d91dbee93c9"
+dependencies = [
+ "core-foundation-sys",
+ "libc",
+]
+
 [[package]]
 name = "tagptr"
 version = "0.2.0"
diff --git a/Cargo.toml b/Cargo.toml
index 0d10b62..c001714 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,6 +9,9 @@ homepage = "https://github.com/edg-l/teeobserver"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
+[profile.release]
+lto = "fat"
+
 [profile.dev.package.sqlx-macros]
 opt-level = 3
 
diff --git a/README.md b/README.md
index 097eade..34064bf 100644
--- a/README.md
+++ b/README.md
@@ -51,6 +51,7 @@ Useful typescript interfaces:
 // Event structure send to the websocket
 
 export interface MasterEvent {
+    observers: number
     event: Event
     time: string
 }
diff --git a/src/routes.rs b/src/routes.rs
index 3513924..3f7b356 100644
--- a/src/routes.rs
+++ b/src/routes.rs
@@ -9,8 +9,8 @@ use axum::{
     TypedHeader,
 };
 use serde_json::json;
-use time::{OffsetDateTime, format_description};
-use tokio::sync::broadcast;
+use time::{format_description, OffsetDateTime};
+use tokio::sync::broadcast::{self, Sender};
 use tracing::{error, info};
 
 use crate::{structures::MasterEvent, AppState};
@@ -34,7 +34,7 @@ pub async fn ws_handler(
     ws.on_failed_upgrade(|error| {
         error!("error upgrading connection: {error}");
     })
-    .on_upgrade(move |socket| handle_socket(socket, addr, rx))
+    .on_upgrade(move |socket| handle_socket(socket, addr, rx, state.events_sender))
 }
 
 /// Actual websocket statemachine (one will be spawned per connection)
@@ -42,6 +42,7 @@ async fn handle_socket(
     mut socket: WebSocket,
     who: SocketAddr,
     mut events_rx: broadcast::Receiver<Arc<(MasterEvent, OffsetDateTime)>>,
+    events_tx: Arc<Sender<Arc<(MasterEvent, OffsetDateTime)>>>,
 ) {
     loop {
         tokio::select! {
@@ -57,7 +58,7 @@ async fn handle_socket(
                 }
             },
             Ok(event) = events_rx.recv() => {
-                if let Err(e) = handle_event(&mut socket, event).await {
+                if let Err(e) = handle_event(&mut socket, &events_tx, event).await {
                     error!("error sending event: {e}");
                 }
             }
@@ -67,9 +68,11 @@ async fn handle_socket(
 
 async fn handle_event(
     sock: &mut WebSocket,
+    sender: &Sender<Arc<(MasterEvent, OffsetDateTime)>>,
     event: Arc<(MasterEvent, OffsetDateTime)>,
 ) -> Result<(), axum::Error> {
     let payload = json!({
+        "observers": sender.receiver_count(),
         "time": event.1.format(&format_description::well_known::Iso8601::DEFAULT).unwrap(),
         "event": event.0
     });