diff --git a/scripts/upgrade b/scripts/upgrade
index 80d68b0..ef2991e 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -46,7 +46,7 @@ if [ "$upgrade_type" == "UPGRADE_APP" ]
 then
 	ynh_script_progression --message="Upgrading source files..." --weight=2
 
-	mv -f "../sources/ifm.php" "$install_dir/ifm.php"
+	ynh_setup_source --dest_dir="$install_dir"
 fi
 
 chmod -R o-rwx "$install_dir"