diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e09d060..456d30c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,7 +15,7 @@ jobs:
         os: [ubuntu-latest, macos-latest, windows-latest]
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - name: make build directory
       run: cmake -E make_directory ${{runner.workspace}}/build