diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c26c9bd..9c6f722 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -59,7 +59,7 @@ jobs:
       fail-fast: false
     
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v5
@@ -174,7 +174,7 @@ jobs:
   security-scan:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     
     - name: Set up Python
       uses: actions/setup-python@v5
@@ -210,7 +210,7 @@ jobs:
     if: github.event_name == 'schedule' || contains(github.event.head_commit.message, '[perf]')
     
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     
     - name: Set up Python
       uses: actions/setup-python@v5
@@ -242,7 +242,7 @@ jobs:
       url: ${{ steps.deployment.outputs.page_url }}
     
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     
     - name: Set up Python
       uses: actions/setup-python@v5