diff --git a/.github/workflows/cygwin.yml b/.github/workflows/cygwin.yml
index 854924d2..a53bd3e7 100644
--- a/.github/workflows/cygwin.yml
+++ b/.github/workflows/cygwin.yml
@@ -17,7 +17,7 @@ jobs:
         shell: C:\cygwin\bin\bash.exe --noprofile --norc -o igncr -eo pipefail '{0}'
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Set up Cygwin
         uses: cygwin/cygwin-install-action@v6
diff --git a/.github/workflows/github_actions_build.yml b/.github/workflows/github_actions_build.yml
index 8bba0080..357a4676 100644
--- a/.github/workflows/github_actions_build.yml
+++ b/.github/workflows/github_actions_build.yml
@@ -250,7 +250,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: auto-merge
         if: |
           github.actor == 'dependabot[bot]' &&
diff --git a/.github/workflows/mingw.yml b/.github/workflows/mingw.yml
index eb0b54c9..f6af60bf 100644
--- a/.github/workflows/mingw.yml
+++ b/.github/workflows/mingw.yml
@@ -15,7 +15,7 @@ jobs:
     env:
       BUILD_PATH: build_space
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: set up python
         uses: actions/setup-python@v5
diff --git a/.github/workflows/python-tests.yml b/.github/workflows/python-tests.yml
index 70ee0600..195bbbab 100644
--- a/.github/workflows/python-tests.yml
+++ b/.github/workflows/python-tests.yml
@@ -29,18 +29,18 @@ jobs:
         uname -a
 
     - name: Check out ApprovalTests.cpp
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         path: ApprovalTests/ApprovalTests.cpp
 
     - name: Check out ApprovalTests.cpp.StarterProject
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         repository: approvals/ApprovalTests.cpp.StarterProject
         path: ApprovalTests/ApprovalTests.cpp.StarterProject
 
     - name: Check out claremacrae fork of conan-center-index
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         repository: claremacrae/conan-center-index
         path: conan/conan-center-index-claremacrae
@@ -51,7 +51,7 @@ jobs:
         git remote add upstream https://github.com/conan-io/conan-center-index.git
    
     - name: Check out llewellyn's fork of vcpkg
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         repository: isidore/vcpkg
         path: ApprovalTests/vcpkg