diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index 0ac25aa72..f38c6bdf7 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -13,7 +13,7 @@ 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.
diff --git a/.github/workflows/coveralls.yml b/.github/workflows/coveralls.yml
index ee5ff5d35..4474a226f 100644
--- a/.github/workflows/coveralls.yml
+++ b/.github/workflows/coveralls.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up JDK 11
         uses: actions/setup-java@v3
         with:
diff --git a/.github/workflows/javaci.yml b/.github/workflows/javaci.yml
index 273e6e624..d09349ded 100644
--- a/.github/workflows/javaci.yml
+++ b/.github/workflows/javaci.yml
@@ -9,7 +9,7 @@ jobs:
       matrix:
         java: [ '11', '17', '20' ]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up JDK ${{ matrix.Java }}
         uses: actions/setup-java@v3
 
diff --git a/.github/workflows/models.yml b/.github/workflows/models.yml
index 179560008..533a892f1 100644
--- a/.github/workflows/models.yml
+++ b/.github/workflows/models.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     name: Generate Models
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - run: make models
       - name: Set PR variables
         id: vars
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 111f4de43..5063636cc 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -8,7 +8,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up JDK 11
       uses: actions/setup-java@v3
       with:
diff --git a/.github/workflows/services.yml b/.github/workflows/services.yml
index 63a7a5298..c7b5c4a4b 100644
--- a/.github/workflows/services.yml
+++ b/.github/workflows/services.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     name: Generate Models + Services
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - run: make services
       - name: Set PR variables
         id: vars