diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index bdaaeda..5b007dd 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -28,9 +28,9 @@ jobs:
     runs-on: ubuntu-latest
     continue-on-error: ${{ matrix.mruby_version == 'master' }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Clone mruby ${{ matrix.mruby_version }}
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           repository: mruby/mruby
           ref: ${{ matrix.mruby_version }}