diff --git a/.github/workflows/docker-image-ci.yml b/.github/workflows/docker-image-ci.yml
index ee6ced1..1e88bdc 100644
--- a/.github/workflows/docker-image-ci.yml
+++ b/.github/workflows/docker-image-ci.yml
@@ -2,6 +2,8 @@ name: docker image ci
 
 on:
   push:
+    branches:
+    - master
     tags:
     - invalid-tag