diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index cfffcba..150d696 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -8,7 +8,7 @@ jobs:
         runs-on: 'ubuntu-latest'
         steps:
             -   name: 'checkout repo'
-                uses: 'actions/checkout@v2'
+                uses: 'actions/checkout@v4'
             -   name: 'setup JDK 1.8'
                 uses: 'actions/setup-java@v1'
                 with: