diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 94ef4649..3fbeb4e9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,5 +1,10 @@
 name: CI
-on: pull_request
+on:
+  pull_request:
+    types: [opened, synchronize]
+    branches:
+      - main
+      - preview
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
@@ -19,7 +24,7 @@ jobs:
       - name: Set up Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: '22'
+          node-version: "22"
 
       - name: Check for broken links
         run: |