diff --git a/scripts/upgrade b/scripts/upgrade
index 48b47fb..f7aa976 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -77,7 +77,7 @@ then
 	ynh_script_progression --message="Upgrading source files..."
 
 	# Download, check integrity, uncompress and patch the source from app.src
-	ynh_setup_source --dest_dir="$final_path/static" --keep="$$final_path/static/instance/"
+	ynh_setup_source --dest_dir="$final_path/static" --keep="instance"
 fi
 
 chmod 750 "$final_path"