diff --git a/.github/workflows/deploy-gh-pages.yaml b/.github/workflows/deploy-gh-pages.yaml
index dda95fead..5fbff052a 100644
--- a/.github/workflows/deploy-gh-pages.yaml
+++ b/.github/workflows/deploy-gh-pages.yaml
@@ -1,6 +1,8 @@
 name: Deploy to GitHub Pages
 
-on: [push]
+on:
+  push:
+    branches: [master]
 
 jobs:
   deploy-to-pages: