diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index ca7719e0e46aa565f19515f1c4fd59b9685e5af4..18f96dbf309c1028c42369ab962c61e5f5da3b10 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -18,7 +18,7 @@ test:
   after_script:
   - rm gitID.txt
   cache:
-    key: "$CI_PROJECT_NAMESPACE/$CI_PROJECT_NAME/$CI_JOB_NAME"
+    key: "$CI_PROJECT_NAMESPACE:$CI_PROJECT_NAME:$CI_JOB_NAME"
     untracked: true
   artifacts:
     expire_in: 4w