diff --git a/.github/workflows/pr-verify.yml b/.github/workflows/pr-verify.yml
index d8af574..26e0ee8 100644
--- a/.github/workflows/pr-verify.yml
+++ b/.github/workflows/pr-verify.yml
@@ -9,6 +9,12 @@ on:
   # main branch.
   pull_request_target:
     types: [opened, edited, reopened, synchronize]
+    branches:
+      - main
+      - release-*
+
+permissions:
+  contents: read
 
 jobs:
   verify: