diff --git a/.github/workflows/ai_pr_review.yml b/.github/workflows/ai_pr_review.yml
index 35b9e3a2..e7c723fa 100644
--- a/.github/workflows/ai_pr_review.yml
+++ b/.github/workflows/ai_pr_review.yml
@@ -78,7 +78,7 @@ jobs:
             core.setOutput("base_ref", pr.data.base.ref);
             core.setOutput("head_ref", pr.data.head.ref);
 
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           ref: refs/pull/${{ steps.pr.outputs.number }}/merge
 
diff --git a/.github/workflows/notebooks.yml b/.github/workflows/notebooks.yml
index 7c627af5..b633fe05 100644
--- a/.github/workflows/notebooks.yml
+++ b/.github/workflows/notebooks.yml
@@ -32,7 +32,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Set up Python
         uses: actions/setup-python@v5
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index e79e3b5b..7711a60a 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -22,7 +22,7 @@ jobs:
             container: quay.io/pypa/manylinux_2_28_aarch64
             artifact: wheels-linux-aarch64
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Install system dependencies
         run: dnf install -y openssl-devel perl-IPC-Cmd openblas-devel
@@ -67,7 +67,7 @@ jobs:
       matrix:
         python-version: ['3.9', '3.10', '3.11', '3.12', '3.13', '3.14']
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Set up Python
         uses: actions/setup-python@v5
@@ -97,7 +97,7 @@ jobs:
       matrix:
         python-version: ['3.9', '3.10', '3.11', '3.12', '3.13', '3.14']
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Set up Python
         uses: actions/setup-python@v5
@@ -124,7 +124,7 @@ jobs:
     name: Build source distribution
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Set up Python
         uses: actions/setup-python@v5
diff --git a/.github/workflows/rust-test.yml b/.github/workflows/rust-test.yml
index befd545a..dd89c473 100644
--- a/.github/workflows/rust-test.yml
+++ b/.github/workflows/rust-test.yml
@@ -41,7 +41,7 @@ jobs:
         os: [ubuntu-latest, macos-latest, windows-latest, ubuntu-24.04-arm]
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@stable
@@ -76,7 +76,7 @@ jobs:
         python-version: ['3.11', '3.13', '3.14']
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Set up Python
         uses: actions/setup-python@v5
@@ -173,7 +173,7 @@ jobs:
       || contains(github.event.pull_request.labels.*.name, 'ready-for-ci')
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Set up Python
         uses: actions/setup-python@v5