diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index dcd2bfa..a04d85d 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -38,6 +38,8 @@ Build Docker Images:
 Build:
   stage: build
   when: manual
+  only:
+    - master
   allow_failure: false
   parallel:
     matrix: