diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 88d3e06e..e6023e58 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -3,7 +3,7 @@ name: Create documents with make
 on:
   push:
     branches:
-      - '*'
+      - master
   pull_request:
 
 jobs: