diff --git a/scripts/upgrade b/scripts/upgrade
index 8a7782a..9346fe3 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -3,7 +3,7 @@
 set -eu
 # Source app helpers
 source /usr/share/yunohost/helpers
-source ./_common
+source ./_common.sh
 
 app=$YNH_APP_INSTANCE_NAME