diff --git a/src/yunohost/app.py b/src/yunohost/app.py
index 0784f1ecc..d64baeaa3 100644
--- a/src/yunohost/app.py
+++ b/src/yunohost/app.py
@@ -667,7 +667,6 @@ def app_upgrade(app=[], url=None, file=None):
         # Execute App upgrade script
         os.system('chown -hR admin: %s' % INSTALL_TMP)
 
-
         try:
             upgrade_retcode = hook_exec(extracted_app_folder + '/scripts/upgrade',
                                         args=args_list, env=env_dict)[0]