diff --git a/.github/workflows/commitlint.yml b/.github/workflows/commitlint.yml
index bc3f82a2..06126aa4 100644
--- a/.github/workflows/commitlint.yml
+++ b/.github/workflows/commitlint.yml
@@ -6,7 +6,7 @@ jobs:
   commitlint:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         fetch-depth: 0
     - name: Setup Node
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 141342fd..bdf9899f 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -20,7 +20,7 @@ jobs:
       matrix:
         ruby: [ '3.2', '3.3', '3.4' ]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Install BLAS and LAPACK
         run: sudo apt-get install -y libopenblas-dev liblapacke-dev
       - name: Set up Ruby ${{ matrix.ruby }}
@@ -34,7 +34,7 @@ jobs:
     runs-on: windows-latest
     name: Ruby 3.4 (Windows)
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Ruby 3.4
         uses: ruby/setup-ruby@v1
         with:
@@ -60,7 +60,7 @@ jobs:
     runs-on: macos-latest
     name: Ruby 3.4 (macOS)
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Install OpenBLAS
       run: |
         brew update
diff --git a/.github/workflows/rubocop.yml b/.github/workflows/rubocop.yml
index 631b7672..080e55d8 100644
--- a/.github/workflows/rubocop.yml
+++ b/.github/workflows/rubocop.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     name: RuboCop
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Ruby 3.2
         uses: ruby/setup-ruby@v1
         with: