diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6387582e..ace90299 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,7 +16,7 @@ jobs:
         os: [ 'ubuntu-latest' ]
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3.1.0
     - name: Set up JDK
       uses: actions/setup-java@v2
       with: