diff --git a/.github/workflows/formatter.yml b/.github/workflows/formatter.yml
index c323400..adb8da3 100644
--- a/.github/workflows/formatter.yml
+++ b/.github/workflows/formatter.yml
@@ -6,7 +6,7 @@ jobs:
   format:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Setup .NET 9
         uses: actions/setup-dotnet@v4
         with:
diff --git a/.github/workflows/nuget_package_push.yml b/.github/workflows/nuget_package_push.yml
index 9ef508a..c0c32e1 100644
--- a/.github/workflows/nuget_package_push.yml
+++ b/.github/workflows/nuget_package_push.yml
@@ -11,7 +11,7 @@ jobs:
     env:
       ACTIONS_ALLOW_UNSECURE_COMMANDS: "true"
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Setup .NET Core
         uses: actions/setup-dotnet@v4
         with:
diff --git a/.github/workflows/nuget_package_push_prerelease.yml b/.github/workflows/nuget_package_push_prerelease.yml
index c2f27ee..582cbb2 100644
--- a/.github/workflows/nuget_package_push_prerelease.yml
+++ b/.github/workflows/nuget_package_push_prerelease.yml
@@ -16,7 +16,7 @@ jobs:
         id: current-time
         with:
           format: YYYYMMDDHHmmss
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Setup .NET Core
         uses: actions/setup-dotnet@v4
         with:
diff --git a/.github/workflows/unittests_and_coverage.yml b/.github/workflows/unittests_and_coverage.yml
index 2ae5f44..b8eeaf2 100644
--- a/.github/workflows/unittests_and_coverage.yml
+++ b/.github/workflows/unittests_and_coverage.yml
@@ -9,7 +9,7 @@ jobs:
       matrix:
         dotnet-version: [ "9" ]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Setup .NET Core
         uses: actions/setup-dotnet@v4
         with:
@@ -21,7 +21,7 @@ jobs:
     needs: unittest
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Setup .NET Core
         uses: actions/setup-dotnet@v4
         with: