diff --git a/.github/workflows/CD_production.yml b/.github/workflows/CD_production.yml
index 2376357c..32576861 100644
--- a/.github/workflows/CD_production.yml
+++ b/.github/workflows/CD_production.yml
@@ -15,7 +15,7 @@ jobs:
 
         steps:
         - name: Check out source repository
-          uses: actions/checkout@v4
+          uses: actions/checkout@v6
           with:
             fetch-depth: 0
 
diff --git a/.github/workflows/CD_staging.yml b/.github/workflows/CD_staging.yml
index b925855e..fa0d269d 100644
--- a/.github/workflows/CD_staging.yml
+++ b/.github/workflows/CD_staging.yml
@@ -15,7 +15,7 @@ jobs:
 
         steps:
         - name: Check out source repository
-          uses: actions/checkout@v4
+          uses: actions/checkout@v6
           with:
             fetch-depth: 0
 
diff --git a/.github/workflows/format_code.yml b/.github/workflows/format_code.yml
index 98a8bb30..47d08c7e 100644
--- a/.github/workflows/format_code.yml
+++ b/.github/workflows/format_code.yml
@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out source repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Set up Python environment - 3.12
         uses: actions/setup-python@v5
         with:
@@ -34,7 +34,7 @@ jobs:
       contents: write
       pull-requests: write
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           ref: ${{ github.head_ref }}
       - uses: psf/black@stable
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 015f0902..ec211c03 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -11,7 +11,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 2818c783..9e600fd2 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -50,7 +50,7 @@ jobs:
 
     steps:
       - name: Check out source repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Install uv
         uses: astral-sh/setup-uv@v5