diff --git a/.github/workflows/azure-functions-app-dotnet.yml b/.github/workflows/azure-functions-app-dotnet.yml
index cf21a0c..ec47ce0 100644
--- a/.github/workflows/azure-functions-app-dotnet.yml
+++ b/.github/workflows/azure-functions-app-dotnet.yml
@@ -33,7 +33,7 @@ jobs:
     environment: dev
     steps:
     - name: 'Checkout GitHub Action'
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     # If you want to use Azure RBAC instead of Publish Profile, then uncomment the task below
     # - name: 'Login via Azure CLI'
diff --git a/.github/workflows/azure-webapps-dotnet-core.yml b/.github/workflows/azure-webapps-dotnet-core.yml
index 02dc6a2..f39ff46 100644
--- a/.github/workflows/azure-webapps-dotnet-core.yml
+++ b/.github/workflows/azure-webapps-dotnet-core.yml
@@ -37,7 +37,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Set up .NET Core
         uses: actions/setup-dotnet@v2
diff --git a/.github/workflows/crystal.yml b/.github/workflows/crystal.yml
index 3579381..f777cd6 100644
--- a/.github/workflows/crystal.yml
+++ b/.github/workflows/crystal.yml
@@ -15,7 +15,7 @@ jobs:
       image: crystallang/crystal
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Install dependencies
       run: shards install
     - name: Run tests
diff --git a/.github/workflows/defender-for-devops.yml b/.github/workflows/defender-for-devops.yml
index 9a4a212..64e5d47 100644
--- a/.github/workflows/defender-for-devops.yml
+++ b/.github/workflows/defender-for-devops.yml
@@ -32,7 +32,7 @@ jobs:
     runs-on: windows-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: actions/setup-dotnet@v3
       with:
         dotnet-version: |
diff --git a/.github/workflows/mdbook.yml b/.github/workflows/mdbook.yml
index 21c0296..3f2dd41 100644
--- a/.github/workflows/mdbook.yml
+++ b/.github/workflows/mdbook.yml
@@ -31,7 +31,7 @@ jobs:
     env:
       MDBOOK_VERSION: 0.4.21
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install mdBook
         run: |
           curl --proto '=https' --tlsv1.2 https://sh.rustup.rs -sSf -y | sh
diff --git a/.github/workflows/msbuild.yml b/.github/workflows/msbuild.yml
index 4ff5521..921f09e 100644
--- a/.github/workflows/msbuild.yml
+++ b/.github/workflows/msbuild.yml
@@ -28,7 +28,7 @@ jobs:
     runs-on: windows-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Add MSBuild to PATH
       uses: microsoft/setup-msbuild@v1.0.2