diff --git a/scripts/release.sh b/scripts/release.sh
index 7fd7228..bff16f5 100755
--- a/scripts/release.sh
+++ b/scripts/release.sh
@@ -186,7 +186,7 @@ then
 	exit 1
 fi
 
-# Do not update pyproject.toml
+# Do not update setup.cfg
 # if the build fails anyways
 if ! python -m build
 then
@@ -194,14 +194,14 @@ then
 	exit 1
 fi
 
-echo "[*] updating version in pyproject.toml ..."
+echo "[*] updating version in setup.cfg ..."
 # can safely be ran multiple times
-sed -i "s/^version =.*/version = \"${tag_name:1}\"/" pyproject.toml
+sed -i "s/^version =.*/version = ${tag_name:1}/" setup.cfg
 
 echo "[*] wiping old dist ..."
 [[ -d dist ]] && rm -rf dist
 
-# Try build again after pyproject.toml update
+# Try build again after setup.cfg update
 if ! python -m build
 then
 	echo "Error: build failed"
@@ -260,16 +260,16 @@ cp dist/twnet_parser-"${tag_name:1}".tar.gz /tmp/twnet_parser_test/
 
 echo "[*] venv tests passed."
 
-if ! git add pyproject.toml
+if ! git add setup.cfg
 then
 	echo "Error: git add failed"
 	exit 1
 fi
 
-if [ "$(git diff HEAD --name-only)" != "pyproject.toml" ]
+if [ "$(git diff HEAD --name-only)" != "setup.cfg" ]
 then
 	echo "Error: unexpected files would be included in the commit"
-	git diff HEAD  --name-only | grep -v '^pyproject.toml$' | awk '{ print "  " $0 }'
+	git diff HEAD  --name-only | grep -v '^setup.cfg$' | awk '{ print "  " $0 }'
 	exit 1
 fi