diff --git a/.github/workflows/CodeQL.yml b/.github/workflows/CodeQL.yml
index 056c83b..962def6 100644
--- a/.github/workflows/CodeQL.yml
+++ b/.github/workflows/CodeQL.yml
@@ -24,7 +24,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
diff --git a/.github/workflows/DocumentationBuild.yml b/.github/workflows/DocumentationBuild.yml
index 5c4b5ff..eecc370 100644
--- a/.github/workflows/DocumentationBuild.yml
+++ b/.github/workflows/DocumentationBuild.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout project source
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up Python
         uses: actions/setup-python@v4
diff --git a/.github/workflows/PackagePublish.yml b/.github/workflows/PackagePublish.yml
index 2c642d9..c692c29 100644
--- a/.github/workflows/PackagePublish.yml
+++ b/.github/workflows/PackagePublish.yml
@@ -38,7 +38,7 @@ jobs:
 
     steps:
       - name: Checkout source
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up Python
         uses: actions/setup-python@v4
diff --git a/.github/workflows/PackageTest.yml b/.github/workflows/PackageTest.yml
index 8cefaa3..376ccf5 100644
--- a/.github/workflows/PackageTest.yml
+++ b/.github/workflows/PackageTest.yml
@@ -16,7 +16,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Setup Python
         uses: actions/setup-python@v4