diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index a521127..aef8024 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -15,7 +15,7 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Set up JDK 1.8
       uses: actions/setup-java@v1
       with: