diff --git a/.github/workflows/security.yml b/.github/workflows/security.yml
index 5dbc4cc..e57ed48 100644
--- a/.github/workflows/security.yml
+++ b/.github/workflows/security.yml
@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
     if: github.repository == 'uicacer/STREAM'
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - name: Set up Python
         uses: actions/setup-python@v5
@@ -50,7 +50,7 @@ jobs:
     runs-on: ubuntu-latest
     if: github.repository == 'uicacer/STREAM'
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - name: Set up Python
         uses: actions/setup-python@v5
@@ -89,7 +89,7 @@ jobs:
     runs-on: ubuntu-latest
     if: github.repository == 'uicacer/STREAM'
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
         with:
           fetch-depth: 0  # full history — gitleaks scans all commits