diff --git a/.github/workflows/simulate.yml b/.github/workflows/simulate.yml
index 2ae1397..7c80338 100644
--- a/.github/workflows/simulate.yml
+++ b/.github/workflows/simulate.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Check out repository
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
 
     - name: Prepare Python
       uses: actions/setup-python@v6