diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index f28c8b2..d68876d 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -16,7 +16,7 @@ image: docker:$DOCKER_VERSION-git
 
 .rules:deploy:
   rules:
-    - if: '$CI_PIPELINE_SOURCE = "push" && $CI_COMMIT_BRANCH = $CI_DEFAULT_BRANCH'
+    - if: '$CI_PIPELINE_SOURCE == "push" && $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH'
 
 build:
   rules: !reference [.rules:deploy, rules]