diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9579629..c012e27 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,7 +16,7 @@ jobs:
       matrix:
         python-version: ["3.11", "3.12", "3.13"]
     steps:
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
 
       - name: Install uv
         uses: astral-sh/setup-uv@e58605a9b6da7c637471fab8847a5e5a6b8df081 # v5
@@ -39,7 +39,7 @@ jobs:
     name: Build & smoke-test wheel
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
 
       - name: Install uv
         uses: astral-sh/setup-uv@e58605a9b6da7c637471fab8847a5e5a6b8df081 # v5
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 8d73540..931b17d 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -16,7 +16,7 @@ jobs:
       contents: read
       security-events: write   # required to upload CodeQL results
     steps:
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
 
       - name: Initialize CodeQL
         uses: github/codeql-action/init@b0c4fd77f6c559021d78430ec4d0d169ae74a4eb # v3
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index d0dffb0..2e8ab4a 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -19,7 +19,7 @@ jobs:
     permissions:
       id-token: write   # required for Trusted Publishing
     steps:
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
 
       - name: Install uv
         uses: astral-sh/setup-uv@e58605a9b6da7c637471fab8847a5e5a6b8df081 # v5