diff --git a/.github/workflows/ai_pr_review.yml b/.github/workflows/ai_pr_review.yml
index 0ac8c426..991fddc4 100644
--- a/.github/workflows/ai_pr_review.yml
+++ b/.github/workflows/ai_pr_review.yml
@@ -180,7 +180,7 @@ jobs:
       # durably even after the fork is deleted or branches removed.
       # The previous workflow used `refs/pull/<N>/merge`, which is
       # garbage-collected on closed PRs — this path replaces that.
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         if: steps.pr.outputs.state != 'open' && steps.pr.outputs.is_fork == 'false'
         with:
           ref: refs/pull/${{ steps.pr.outputs.number }}/head
@@ -191,7 +191,7 @@ jobs:
       # has not yet mirrored a freshly API-created PR's head
       # (see .claude/commands/submit-pr.md:327-345). head_sha is
       # guaranteed to exist on the head repo for an open PR.
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         if: steps.pr.outputs.state == 'open' && steps.pr.outputs.is_fork == 'false'
         with:
           repository: ${{ steps.pr.outputs.head_repo_full_name }}
diff --git a/.github/workflows/docs-tests.yml b/.github/workflows/docs-tests.yml
index 40ae1adf..b5ac9114 100644
--- a/.github/workflows/docs-tests.yml
+++ b/.github/workflows/docs-tests.yml
@@ -52,7 +52,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Set up Python
         uses: actions/setup-python@v6
@@ -90,7 +90,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Install pandoc
         # nbsphinx invokes pandoc to render notebook markdown cells.
@@ -128,7 +128,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Set up Python 3.9
         uses: actions/setup-python@v6
diff --git a/.github/workflows/notebooks.yml b/.github/workflows/notebooks.yml
index 282c4df5..1ca9bb62 100644
--- a/.github/workflows/notebooks.yml
+++ b/.github/workflows/notebooks.yml
@@ -35,7 +35,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Set up Python
         uses: actions/setup-python@v6
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index ded5f0d0..daccec67 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -25,7 +25,7 @@ jobs:
             container: quay.io/pypa/manylinux_2_28_aarch64
             artifact: wheels-linux-aarch64
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Install system dependencies
         run: dnf install -y openssl-devel perl-IPC-Cmd openblas-devel
@@ -70,7 +70,7 @@ jobs:
       matrix:
         python-version: ['3.9', '3.10', '3.11', '3.12', '3.13', '3.14']
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Set up Python
         uses: actions/setup-python@v6
@@ -100,7 +100,7 @@ jobs:
       matrix:
         python-version: ['3.9', '3.10', '3.11', '3.12', '3.13', '3.14']
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Set up Python
         uses: actions/setup-python@v6
@@ -127,7 +127,7 @@ jobs:
     name: Build source distribution
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Set up Python
         uses: actions/setup-python@v6
diff --git a/.github/workflows/rust-test.yml b/.github/workflows/rust-test.yml
index ced1d43f..ef12a463 100644
--- a/.github/workflows/rust-test.yml
+++ b/.github/workflows/rust-test.yml
@@ -76,7 +76,7 @@ jobs:
         os: [ubuntu-latest, macos-latest, windows-latest, ubuntu-24.04-arm]
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@stable
@@ -114,7 +114,7 @@ jobs:
         python-version: ['3.11', '3.13', '3.14']
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Set up Python
         uses: actions/setup-python@v6
@@ -218,7 +218,7 @@ jobs:
       || github.event.label.name == 'ready-for-ci'))
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Set up Python
         uses: actions/setup-python@v6