diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c7a2c6b..9ea3041 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -14,7 +14,7 @@ jobs:
     name: "Build JDK 1.8"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v2.3.4
       - name: Set up JDK 1.8
         uses: actions/setup-java@v1
         with:
@@ -25,7 +25,7 @@ jobs:
     name: "Build JDK 11"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v2.3.4
       - name: Set up JDK 11
         uses: actions/setup-java@v1
         with: