diff --git a/.github/workflows/markdown-links.yml b/.github/workflows/markdown-links.yml
index edea7a2..4b806a9 100644
--- a/.github/workflows/markdown-links.yml
+++ b/.github/workflows/markdown-links.yml
@@ -1,6 +1,12 @@
 name: Check Markdown links
 
-on: push
+on:
+  push:
+    branches:
+    - master
+  pull_request:
+    branches:
+    - '*'
 
 jobs:
   markdown-link-check: