diff --git a/.github/workflows/publish_website.yml b/.github/workflows/publish_website.yml
index 38306c2e6..ab7d8531e 100644
--- a/.github/workflows/publish_website.yml
+++ b/.github/workflows/publish_website.yml
@@ -1,5 +1,8 @@
 name: Publish website
-on: [push]
+on:
+  push:
+    branches:
+      - master
 permissions:
   contents: read