diff --git a/.github/workflows/CI_build.yml b/.github/workflows/CI_build.yml
index 9c24aed..5bb5502 100644
--- a/.github/workflows/CI_build.yml
+++ b/.github/workflows/CI_build.yml
@@ -14,7 +14,7 @@ jobs:
         
     steps:
     - name: Checkout repo
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
       with:
         submodules: 'true'