diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 396f9cfe205182d687a1719a8613f2abfc44eea7..631808fb922368d6fe67b322059d8d34d5cd7e80 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -100,7 +100,7 @@ Upgrade helm:
   needs:
     - docker
   before_script:
-    - chmod 600 $KUBECONFIG
+    - chmod 600 "$KUBECONFIG"
   script:
     - bash
     - cd "$CI_PROJECT_DIR"/k8s