diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 9d73ce3..ed55e91 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -18,7 +18,7 @@ jobs:
         runs-on: ubuntu-22.04
 
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@v6
             - uses: actions/setup-node@v4
               with:
                   node-version: 20.9.0
@@ -31,7 +31,7 @@ jobs:
         runs-on: ubuntu-22.04
 
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@v6
             - uses: actions/setup-node@v4
               with:
                   node-version: 20.9.0
@@ -44,7 +44,7 @@ jobs:
         runs-on: ubuntu-22.04
 
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@v6
             - uses: actions/setup-node@v4
               with:
                   node-version: 20.9.0
@@ -57,7 +57,7 @@ jobs:
         runs-on: ubuntu-22.04
 
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@v6
             - uses: actions/setup-node@v4
               with:
                   node-version: 20.9.0
diff --git a/.github/workflows/firebase-hosting-merge.yml b/.github/workflows/firebase-hosting-merge.yml
index 492ee0a..780a8a1 100644
--- a/.github/workflows/firebase-hosting-merge.yml
+++ b/.github/workflows/firebase-hosting-merge.yml
@@ -7,7 +7,7 @@ jobs:
     build_and_deploy:
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@v6
             - uses: actions/setup-node@v4
               with:
                   node-version: 20.9.0
diff --git a/.github/workflows/firebase-hosting-pull-request.yml b/.github/workflows/firebase-hosting-pull-request.yml
index c55805c..f569f44 100644
--- a/.github/workflows/firebase-hosting-pull-request.yml
+++ b/.github/workflows/firebase-hosting-pull-request.yml
@@ -5,7 +5,7 @@ jobs:
         if: '${{ github.event.pull_request.head.repo.full_name == github.repository }}'
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@v6
             - uses: actions/setup-node@v4
               with:
                   node-version: 20.9.0