diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 89a60be..a21d25d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 20
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-dotnet@v4
         with:
           dotnet-version: "10.0.x"
@@ -48,7 +48,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 15
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-dotnet@v4
         with:
           dotnet-version: "10.0.x"
@@ -63,7 +63,7 @@ jobs:
       run:
         working-directory: web
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v4
         with:
           node-version: "24.x"
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 584c9f3..7bb5145 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -29,7 +29,7 @@ jobs:
           - language: javascript-typescript
             build-mode: none
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Initialize CodeQL
         uses: github/codeql-action/init@v3
         with: