diff --git a/.github/workflows/Linux_CI.yml b/.github/workflows/Linux_CI.yml
index a152972753..b9a102c714 100644
--- a/.github/workflows/Linux_CI.yml
+++ b/.github/workflows/Linux_CI.yml
@@ -17,7 +17,7 @@ jobs:
     name: Python ${{ matrix.python-version }} CI
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - run: git fetch --prune --unshallow
 
     - name: Setup python
diff --git a/.github/workflows/MacOS_CI.yml b/.github/workflows/MacOS_CI.yml
index c8bfbbcb7e..2acabd8b44 100644
--- a/.github/workflows/MacOS_CI.yml
+++ b/.github/workflows/MacOS_CI.yml
@@ -19,7 +19,7 @@ jobs:
         python-version: [ '3.11' ]
     name: Python ${{ matrix.python-version }} CI
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - run: git fetch --prune --unshallow
 
       - name: Update bash
diff --git a/.github/workflows/Windows_CI.yml b/.github/workflows/Windows_CI.yml
index 13fdcea8a1..3df2e6265b 100644
--- a/.github/workflows/Windows_CI.yml
+++ b/.github/workflows/Windows_CI.yml
@@ -19,7 +19,7 @@ jobs:
         python-version: [ '3.11' ]
     name: Python ${{ matrix.python-version }} CI
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - run: git fetch --prune --unshallow
 
       - name: Setup python
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index d33545c90f..d3e888f09e 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -16,7 +16,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         # We must fetch at least the immediate parents so that if this is
         # a pull request then we can checkout the head.