diff --git a/misc/ynh-supervisord.conf b/misc/ynh-supervisord.conf
index 7f12851..94a7675 100644
--- a/misc/ynh-supervisord.conf
+++ b/misc/ynh-supervisord.conf
@@ -1,7 +1,7 @@
 [supervisord]
 
 [fcgi-program:uvicorn]
-socket=tcp://localhost:%(ENV_UVICORN_PORT)
+socket=tcp://localhost:%(ENV_UVICORN_PORT)s
 command=%(ENV_VENV_DIR)s/bin/uvicorn app.main:app --no-server-header --fd 0
 numprocs=2
 process_name=uvicorn-%(process_num)d