diff --git a/.github/workflows/dependency_diff.yml b/.github/workflows/dependency_diff.yml
index 0ef1cc9a..05a578c3 100644
--- a/.github/workflows/dependency_diff.yml
+++ b/.github/workflows/dependency_diff.yml
@@ -2,6 +2,12 @@ name: Generate dependency diff
 
 on:
   pull_request:
+    branches: [ main ]
+    paths-ignore:
+      - '**.md'
+      - 'LICENSE'
+      - 'NOTICE'
+      - '.gitignore'
 
 permissions:
   contents: read