diff --git a/.github/workflows/lower-bounds.yml b/.github/workflows/lower-bounds.yml
index 3796702..cad486b 100644
--- a/.github/workflows/lower-bounds.yml
+++ b/.github/workflows/lower-bounds.yml
@@ -16,7 +16,7 @@ jobs:
         python-version: ["3.9"]
 
     steps:
-    - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+    - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v4
       with:
         persist-credentials: false
     - name: Set up Python ${{ matrix.python-version }}
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index d5a3603..614af44 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -15,7 +15,7 @@ jobs:
       matrix:
         python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
     steps:
-    - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+    - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v4
       with:
         persist-credentials: false
     - name: Install the latest version of uv
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index d3e4644..c915ff2 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -10,7 +10,7 @@ jobs:
       id-token: write
     steps:
     - name: Checkout
-      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+      uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v4
       with:
         ref: ${{ github.event.release.tag_name }}
         persist-credentials: false
diff --git a/.github/workflows/zizmor.yml b/.github/workflows/zizmor.yml
index d8ca647..8bf5416 100644
--- a/.github/workflows/zizmor.yml
+++ b/.github/workflows/zizmor.yml
@@ -17,7 +17,7 @@ jobs:
       security-events: write
     steps:
       - name: Checkout repository
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v4
         with:
           persist-credentials: false
       - name: Install the latest version of uv