diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 3c1cf164285c9093504601104c28aee5b3185737..276c6327520632af03bd645579aa0f31a08e20e4 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -17,3 +17,5 @@ build:
         - python publish_images.py
     tags:
         - docker
+    only:
+        - master