diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 704fcf7..5b8b230 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -19,7 +19,7 @@ jobs:
 
     steps:
       - name: Checkout source
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Setup Conda Environment
         uses: conda-incubator/setup-miniconda@v2
diff --git a/.github/workflows/deploy-sdist.yml b/.github/workflows/deploy-sdist.yml
index 89c1759..0329b55 100644
--- a/.github/workflows/deploy-sdist.yml
+++ b/.github/workflows/deploy-sdist.yml
@@ -11,7 +11,7 @@ jobs:
 
     steps:
       - name: Checkout source
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Create sdist
         shell: bash -l {0}
diff --git a/.github/workflows/end-to-end.yaml b/.github/workflows/end-to-end.yaml
index 04aa1ea..56a32c4 100644
--- a/.github/workflows/end-to-end.yaml
+++ b/.github/workflows/end-to-end.yaml
@@ -25,7 +25,7 @@ jobs:
 
     steps:
       - name: Checkout source
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Setup Conda Environment
         uses: conda-incubator/setup-miniconda@v2