diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 452594c..17e8f74 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     
     - name: Setup .NET
       uses: actions/setup-dotnet@v5
diff --git a/.github/workflows/pr-check.yml b/.github/workflows/pr-check.yml
index b2b5fc7..63f9b07 100644
--- a/.github/workflows/pr-check.yml
+++ b/.github/workflows/pr-check.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     
     - name: Setup .NET
       uses: actions/setup-dotnet@v5
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index d798bb0..9547f90 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -13,7 +13,7 @@ jobs:
       contents: write
     
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     
     - name: Setup .NET
       uses: actions/setup-dotnet@v5