diff --git a/.github/workflows/deploy-site.yaml b/.github/workflows/deploy-site.yaml
index 3d2e16f..4b0abbd 100644
--- a/.github/workflows/deploy-site.yaml
+++ b/.github/workflows/deploy-site.yaml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     # checkout to the commit that has been pushed
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
 
     - name: Setup Hugo
       uses: peaceiris/actions-hugo@v3.0.0
diff --git a/.github/workflows/merge-to-main.yml b/.github/workflows/merge-to-main.yml
index ced62ac..247fec9 100644
--- a/.github/workflows/merge-to-main.yml
+++ b/.github/workflows/merge-to-main.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     # checkout to the commit that has been pushed
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
 
     - name: Setup Hugo
       uses: peaceiris/actions-hugo@v3.0.0
diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index 70d8c23..4cacdaa 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     # checkout to the commit that has been pushed
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
 
     - name: Setup Node
       uses: actions/setup-node@v4
diff --git a/.github/workflows/theme-update.yml b/.github/workflows/theme-update.yml
index ca35d86..c8fdf30 100644
--- a/.github/workflows/theme-update.yml
+++ b/.github/workflows/theme-update.yml
@@ -8,7 +8,7 @@ jobs:
   update-theme:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           ref: main