diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index cae1e36..54532a3 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -29,7 +29,7 @@ jobs:
       LISP: ${{ matrix.lisp }}
       QUICKLISP_DIST: ${{ matrix.quicklisp-dist }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Setup Lisp
diff --git a/.github/workflows/Release.yml b/.github/workflows/Release.yml
index f5e8d37..f34e619 100644
--- a/.github/workflows/Release.yml
+++ b/.github/workflows/Release.yml
@@ -13,7 +13,7 @@ jobs:
       QUICKLISP_DIST: ultralisp
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true