diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
index e4eabbe..93b8403 100644
--- a/.github/workflows/maven.yml
+++ b/.github/workflows/maven.yml
@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
     - name: Set up JDK 11
       uses: actions/setup-java@v3
       with: