diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1b46b86..aab5753 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -23,9 +23,9 @@ jobs:
     name: mruby ${{ matrix.mruby_version }}
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Clone mruby ${{ matrix.mruby_version }}
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: mruby/mruby
           ref: ${{ matrix.mruby_version }}