diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 10b1fb9..72be491 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -16,7 +16,7 @@ jobs:
     
     steps:
       - name: checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3.1.0
           
       - name: setup-jdk-16
         uses: actions/setup-java@v2