diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index a899ed5d..7a3d3c77 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -16,7 +16,7 @@ jobs:
     name: Documentation
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v2
         with:
           version: '1'
diff --git a/.github/workflows/docscleanup.yml b/.github/workflows/docscleanup.yml
index d2d4bf7d..b4b3e89f 100644
--- a/.github/workflows/docscleanup.yml
+++ b/.github/workflows/docscleanup.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout gh-pages branch
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           ref: gh-pages
 
diff --git a/.github/workflows/register-pypi.yml b/.github/workflows/register-pypi.yml
index eb703393..8dcee3af 100644
--- a/.github/workflows/register-pypi.yml
+++ b/.github/workflows/register-pypi.yml
@@ -11,7 +11,7 @@ jobs:
   register:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         ref: ${{ inputs.git_ref }}
     - name: Set up Python
diff --git a/.github/workflows/tests-nightly.yml b/.github/workflows/tests-nightly.yml
index fefb83e8..7e6c96d6 100644
--- a/.github/workflows/tests-nightly.yml
+++ b/.github/workflows/tests-nightly.yml
@@ -19,7 +19,7 @@ jobs:
         os: [ubuntu-latest, windows-latest, macos-latest]
         jlversion: ['~1.9.0-0', 'nightly']
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v2
         with:
           version: ${{ inputs.jl_version }}
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 7e0411db..04f6de14 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -21,7 +21,7 @@ jobs:
         os: [ubuntu-latest, windows-latest, macos-latest]
         jlversion: ['1','1.6']
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Set up Julia ${{ matrix.jlversion }}
         uses: julia-actions/setup-julia@v2
         with:
@@ -59,7 +59,7 @@ jobs:
         os: [ubuntu-latest, windows-latest, macos-latest]
         pyversion: ["3.x", "3.8"]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up Python ${{ matrix.pyversion }}
         uses: actions/setup-python@v5
         with: