diff --git a/src/yunohost/app.py b/src/yunohost/app.py
index 8d441c00d..ed7840835 100644
--- a/src/yunohost/app.py
+++ b/src/yunohost/app.py
@@ -1610,7 +1610,7 @@ def app_config_set(
 class AppConfigPanel(ConfigPanel):
     entity_type = "app"
     save_path_tpl = os.path.join(APPS_SETTING_PATH, "{entity}/settings.yml")
-    config_path_tpl = os.path.join(APPS_SETTING_PATH, "{entity}/config_panel.yml")
+    config_path_tpl = os.path.join(APPS_SETTING_PATH, "{entity}/config_panel.toml")
 
     def _load_current_values(self):
         self.values = self._call_config_script("show")