diff --git a/odoo_scripts/docker_dev_start.py b/odoo_scripts/docker_dev_start.py
index a89da5a6e3eb4f9ba409f1fa7eaecc66bbba7380_b2Rvb19zY3JpcHRzL2RvY2tlcl9kZXZfc3RhcnQucHk=..3a884602a664bc89b7ef500a381b6819dac15f79_b2Rvb19zY3JpcHRzL2RvY2tlcl9kZXZfc3RhcnQucHk= 100755
--- a/odoo_scripts/docker_dev_start.py
+++ b/odoo_scripts/docker_dev_start.py
@@ -1396,7 +1396,7 @@
     return int(exit_code)
 
 
-def find_free_port():
+def find_free_port() -> int:
     with closing(socket.socket(socket.AF_INET, socket.SOCK_STREAM)) as s:
         s.bind(("", 0))
         s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)