diff --git a/.github/workflows/code_coverage.yml b/.github/workflows/code_coverage.yml
index f1112ad3..060242fa 100644
--- a/.github/workflows/code_coverage.yml
+++ b/.github/workflows/code_coverage.yml
@@ -16,7 +16,7 @@ jobs:
             
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           submodules: true
           persist-credentials: false
diff --git a/.github/workflows/doxygen.yml b/.github/workflows/doxygen.yml
index 42d5d98b..4da05a1b 100644
--- a/.github/workflows/doxygen.yml
+++ b/.github/workflows/doxygen.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install doxygen
         run: sudo apt install doxygen -y
       - name: Run Doxygen
diff --git a/.github/workflows/sanitize.yml b/.github/workflows/sanitize.yml
index 6659b793..3dfc127e 100644
--- a/.github/workflows/sanitize.yml
+++ b/.github/workflows/sanitize.yml
@@ -16,7 +16,7 @@ jobs:
             
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           submodules: true
           persist-credentials: false
diff --git a/.github/workflows/serde_compat.yml b/.github/workflows/serde_compat.yml
index 07be5c85..cdc2fc50 100644
--- a/.github/workflows/serde_compat.yml
+++ b/.github/workflows/serde_compat.yml
@@ -12,9 +12,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Checkout Java
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: apache/datasketches-java
           path: java