diff --git a/.github/workflows/Benchmarks.yml b/.github/workflows/Benchmarks.yml
index c09f1ce..5d9e1de 100644
--- a/.github/workflows/Benchmarks.yml
+++ b/.github/workflows/Benchmarks.yml
@@ -15,7 +15,7 @@ jobs:
           - python-version: "3.9"
           - python-version: "3.10"
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v4
       with:
diff --git a/.github/workflows/Examples.yml b/.github/workflows/Examples.yml
index dcc3ff8..b7414d7 100644
--- a/.github/workflows/Examples.yml
+++ b/.github/workflows/Examples.yml
@@ -15,7 +15,7 @@ jobs:
           - python-version: "3.9"
           - python-version: "3.10"
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v4
       with:
diff --git a/.github/workflows/Formatting.yml b/.github/workflows/Formatting.yml
index b38fa6c..f6f5c29 100644
--- a/.github/workflows/Formatting.yml
+++ b/.github/workflows/Formatting.yml
@@ -10,7 +10,7 @@ jobs:
   pre-commit:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: actions/setup-python@v4
     - name: Download flake8 config
       run: wget https://raw.githubusercontent.com/mdolab/.github/master/.flake8;
diff --git a/.github/workflows/Tests.yml b/.github/workflows/Tests.yml
index 2443ab2..34a0069 100644
--- a/.github/workflows/Tests.yml
+++ b/.github/workflows/Tests.yml
@@ -15,7 +15,7 @@ jobs:
           - python-version: "3.9"
           - python-version: "3.10"
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v4
       with:
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 22972a0..d1054cd 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -10,7 +10,7 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup Python
         uses: actions/setup-python@v4