diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index c0033b9..5720e37 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -67,6 +67,6 @@ ncc-docker-build:
     - docker build --pull -t "$CI_REGISTRY_IMAGE${tag}" .
     - docker push "$CI_REGISTRY_IMAGE${tag}"
   rules:
-    - if: $CI_COMMIT_BRANCH
+    - if: $CI_COMMIT_BRANCH == 'master'
       exists:
         - Dockerfile