diff --git a/.github/workflows/pull_request.yml b/.github/workflows/pull_request.yml
index ef8164c..329b7ac 100644
--- a/.github/workflows/pull_request.yml
+++ b/.github/workflows/pull_request.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     - uses: dart-lang/setup-dart@v1