diff --git a/.github/workflows/dockerimage.yml b/.github/workflows/dockerimage.yml
index dd1aea0..341f7ef 100644
--- a/.github/workflows/dockerimage.yml
+++ b/.github/workflows/dockerimage.yml
@@ -3,7 +3,7 @@ name: ci
 on:
   push:
     branches:
-      - 'main'
+      - 'master'
 
 # see https://docs.github.com/en/packages/managing-github-packages-using-github-actions-workflows/publishing-and-installing-a-package-with-github-actions#publishing-a-package-using-an-action
 jobs: