diff --git a/.github/workflows/CDA-testing.yml b/.github/workflows/CDA-testing.yml
index 3c7eafd..ed6a101 100644
--- a/.github/workflows/CDA-testing.yml
+++ b/.github/workflows/CDA-testing.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Clean up disk space, so we don't run out.
         if: runner.os == 'Linux'
diff --git a/.github/workflows/code-check.yml b/.github/workflows/code-check.yml
index d4db3fb..f28ba95 100644
--- a/.github/workflows/code-check.yml
+++ b/.github/workflows/code-check.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       # Verify that python files are formatted using black and isort. Both of the actions
       # below simply check the source code and fail if they find any files that need to be
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 1d92754..e47677f 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Initialize CodeQL
         uses: github/codeql-action/init@v4
diff --git a/.github/workflows/pypi-deploy.yml b/.github/workflows/pypi-deploy.yml
index 1d24aa3..cb8194e 100644
--- a/.github/workflows/pypi-deploy.yml
+++ b/.github/workflows/pypi-deploy.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Set Up Python
         uses: actions/setup-python@v6
diff --git a/.github/workflows/test-deploy.yml b/.github/workflows/test-deploy.yml
index 3da8d1b..c4e7051 100644
--- a/.github/workflows/test-deploy.yml
+++ b/.github/workflows/test-deploy.yml
@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Set Up Python
         uses: actions/setup-python@v6
diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index f43bbd2..abb509f 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Set Up Python
         uses: actions/setup-python@v6