diff --git a/.github/workflows/analyze.yml b/.github/workflows/analyze.yml
index c352a10..e0e95a4 100644
--- a/.github/workflows/analyze.yml
+++ b/.github/workflows/analyze.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
     
     - name: Set up Python
       uses: actions/setup-python@v4
diff --git a/.github/workflows/pr-test.yml b/.github/workflows/pr-test.yml
index 44feeab..9dc2422 100644
--- a/.github/workflows/pr-test.yml
+++ b/.github/workflows/pr-test.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
     
     - name: Set up Python
       uses: actions/setup-python@v4
diff --git a/.github/workflows/python-publish.yml b/.github/workflows/python-publish.yml
index 82f8dbd..aca4a18 100644
--- a/.github/workflows/python-publish.yml
+++ b/.github/workflows/python-publish.yml
@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
 
       - uses: actions/setup-python@v5
         with:
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index f1ff68a..8be96f0 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -17,7 +17,7 @@ jobs:
         python-version: ['3.8', '3.9', '3.10', '3.11', '3.12']
     
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
     
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v4
@@ -44,7 +44,7 @@ jobs:
     runs-on: ubuntu-latest
     
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
     
     - name: Set up Python
       uses: actions/setup-python@v4