diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 913816b..228b845 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,7 +11,7 @@ jobs:
     name: Lint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v6.0.2
 
       - name: Install uv
         uses: astral-sh/setup-uv@v8.1.0
@@ -38,7 +38,7 @@ jobs:
       matrix:
         python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v6.0.2
 
       - name: Install uv
         uses: astral-sh/setup-uv@v8.1.0
@@ -58,7 +58,7 @@ jobs:
     name: Build package
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v6.0.2
 
       - name: Install uv
         uses: astral-sh/setup-uv@v8.1.0