diff --git a/.github/workflows/format_check.yml b/.github/workflows/format_check.yml
index 4a44bf3ae..d90d528db 100644
--- a/.github/workflows/format_check.yml
+++ b/.github/workflows/format_check.yml
@@ -12,18 +12,18 @@ jobs:
     runs-on: ubuntu-latest
     name: Black
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4.1.6
       - name: Set up Python
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v5.1.0
       - name: Black
         uses: psf/black@22.3.0  # already includes args "--check --diff"
   flake8:
     runs-on: ubuntu-latest
     name: Flake8
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4.1.6
       - name: Set up Python
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v5.1.0
         with:
           python-version: '3.9'
       - name: Install dependencies
@@ -42,9 +42,9 @@ jobs:
     runs-on: ubuntu-latest
     name: isort
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4.1.6
       - name: Set up Python
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v5.1.0
         with:
           python-version: '3.9'
       - name: Install dependencies
diff --git a/.github/workflows/test_suite.yml b/.github/workflows/test_suite.yml
index 30f9d0f23..fc3bba559 100644
--- a/.github/workflows/test_suite.yml
+++ b/.github/workflows/test_suite.yml
@@ -17,7 +17,7 @@ jobs:
       matrix:
         python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4.1.6
     - uses: s-weigand/setup-conda@v1
       with:
         activate-conda: true
@@ -56,9 +56,9 @@ jobs:
         python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
       fail-fast: false
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4.1.6
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v5.1.0
         with:
           python-version: ${{ matrix.python-version }}
 
@@ -121,9 +121,9 @@ jobs:
         python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
       fail-fast: false
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4.1.6
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v5.1.0
         with:
           python-version: ${{ matrix.python-version }}