diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index 3cb1073..edf87a8 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -3,16 +3,19 @@ name: Pull Request
 
 jobs:
   test:
+    env:
+      CI: true
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+      - uses: pnpm/action-setup@v4
+        name: Install pnpm
+        with:
+          version: 9
       - uses: actions/setup-node@v4
         with:
           node-version: 22
           cache: 'pnpm'
-      - name: Install dependencies
-        env:
-          CI: true
-        run: pnpm install
+      - run: pnpm install
       - name: Test
         run: pnpm test