diff --git a/.github/workflows/check-release-notes.yml b/.github/workflows/check-release-notes.yml
index 16970db4..0f3924ad 100644
--- a/.github/workflows/check-release-notes.yml
+++ b/.github/workflows/check-release-notes.yml
@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 1
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Default MISSING_CHANGELOG_ENTRY to 1
         run: echo 'MISSING_CHANGELOG_ENTRY=1' >> "$GITHUB_ENV"
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 26347ccc..c8a936be 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 6
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/actions/setup-python
         with:
           python-version: "3.10"
@@ -66,7 +66,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     timeout-minutes: 8
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           # TODO: This can be very expensive for large repos. Is there a better way to do this?
           # Fetch all history and tags for setuptools_scm to work
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 351e9c3c..711fbf37 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -29,7 +29,7 @@ jobs:
       # actions: read
       # contents: read
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - uses: github/codeql-action/init@v4
       with:
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 93c0f536..6dfd6649 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -32,7 +32,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 6
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           # TODO: This can be very expensive for large repos. Is there a better way to do this?
           # Fetch all history and tags for setuptools_scm to work
@@ -105,7 +105,7 @@ jobs:
     steps:
 
       # Generate the release notes
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           # TODO: This can be very expensive for large repos. Is there a better way to do this?
           # Fetch all history and tags for setuptools_scm to work
diff --git a/docs/reference/changelog.md b/docs/reference/changelog.md
index c4109dd0..f5b73712 100644
--- a/docs/reference/changelog.md
+++ b/docs/reference/changelog.md
@@ -8,6 +8,7 @@ Unreleased changes
 ## CI/CD
 
 - Bump sigstore/gh-action-sigstore-python from 3.1.0 to 3.2.0 ({gh-pr}`359`)
+- Bump actions/checkout from 5 to 6 ({gh-pr}`357`)
 - Bump actions/download-artifact from 5 to 6 ({gh-pr}`354`)
 - Bump actions/upload-artifact from 4 to 5 ({gh-pr}`353`)
 - Bump sigstore/gh-action-sigstore-python from 3.0.1 to 3.1.0 ({gh-pr}`352`)