diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 8bc7408..2bba0cc 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Git checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           submodules: recursive # fetch Hugo themes
           fetch-depth: 0
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index bb612c9..5607f44 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Git checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           submodules: recursive # fetch Hugo themes
           fetch-depth: 0