diff --git a/.github/workflows/CI_checks.yml b/.github/workflows/CI_checks.yml
index 8eb391e..f795f88 100644
--- a/.github/workflows/CI_checks.yml
+++ b/.github/workflows/CI_checks.yml
@@ -14,7 +14,7 @@ jobs:
 
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python 3
       uses: actions/setup-python@v4
       with:
@@ -37,7 +37,7 @@ jobs:
       matrix:
         python-version: [3.8, 3.9, '3.10', '3.11']
     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 4f4095f..a43f1bc 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -11,7 +11,7 @@ jobs:
       name: Build and push docs to GH pages
       runs-on: "ubuntu-latest"
       steps: 
-        - uses: actions/checkout@v3
+        - uses: actions/checkout@v4
 
         - name: "Set up Python 3"
           uses: actions/setup-python@v4
diff --git a/.github/workflows/release-python.yml b/.github/workflows/release-python.yml
index a12eb4e..2f51a75 100644
--- a/.github/workflows/release-python.yml
+++ b/.github/workflows/release-python.yml
@@ -13,7 +13,7 @@ jobs:
         os: [ubuntu-20.04]
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up Python 3
         uses: actions/setup-python@v4
         with: