diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a1ebe34..b0691f0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -77,7 +77,7 @@ jobs:
             }
     steps:
       - name: Checkout repository.
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           submodules: true
       - name: Install dependencies.