diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 11862524..5e4941eb 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -21,7 +21,7 @@ jobs:
           - '3.2'
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - uses: hidakatsuya/action-setup-diff-pdf@v1
       with: