diff --git a/.github/workflows/check_unexpected_changes.yaml b/.github/workflows/check_unexpected_changes.yaml
index 2c234d07..ca550f26 100644
--- a/.github/workflows/check_unexpected_changes.yaml
+++ b/.github/workflows/check_unexpected_changes.yaml
@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
     - name: Check out repo
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
 
     - name: Generate the JSON Schema
       uses: ./.github/workflows/generate_jsonschema
diff --git a/.github/workflows/generate_jsonschema.yaml b/.github/workflows/generate_jsonschema.yaml
index 7b9a2441..1fca8520 100644
--- a/.github/workflows/generate_jsonschema.yaml
+++ b/.github/workflows/generate_jsonschema.yaml
@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Check out repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Generate the JSON Schema
         uses: ./.github/workflows/generate_jsonschema
diff --git a/.github/workflows/test_clients.yaml b/.github/workflows/test_clients.yaml
index 6d0b1f2b..e5d21235 100644
--- a/.github/workflows/test_clients.yaml
+++ b/.github/workflows/test_clients.yaml
@@ -30,10 +30,10 @@ jobs:
       DOTNET_NOLOGO: true
     steps:
     - name: Proto Schemas > Checkout Repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
 
     - name: .NET Library > Checkout Repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         repository: googleapis/google-cloudevents-dotnet
         path: google-cloudevents-dotnet
@@ -55,13 +55,13 @@ jobs:
       DATA_SOURCE_CHECKOUT_PATH: google-cloudevents
     steps:
       - name: Java Library > Checkout Repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           repository: googleapis/google-cloudevents-java
           path: ${{ env.LIBRARY_CHECKOUT_PATH }}
 
       - name: Proto Schemas > Checkout Repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           path: ${{ env.DATA_SOURCE_CHECKOUT_PATH }}
 
@@ -92,13 +92,13 @@ jobs:
     
     steps:
     - name: Go Library > Checkout Repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         repository: googleapis/google-cloudevents-go
         path: ${{ env.LIBRARY_CHECKOUT_PATH }}
     
     - name: Proto Schemas > Checkout Repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         path: ${{ env.DATA_SOURCE_CHECKOUT_PATH }}
 
diff --git a/.github/workflows/test_jsonschemas.yaml b/.github/workflows/test_jsonschemas.yaml
index a05728ed..f5deb225 100644
--- a/.github/workflows/test_jsonschemas.yaml
+++ b/.github/workflows/test_jsonschemas.yaml
@@ -26,7 +26,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
     - name: Check out repo
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
 
     - name: Setup Node
       uses: actions/setup-node@v4
diff --git a/.github/workflows/test_proto_syntax.yaml b/.github/workflows/test_proto_syntax.yaml
index d9b437a8..93b2b4ac 100644
--- a/.github/workflows/test_proto_syntax.yaml
+++ b/.github/workflows/test_proto_syntax.yaml
@@ -27,7 +27,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
     - name: Check out repo
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
 
     - name: Test proto syntax via compilation
       run: ./scripts/compile.sh