diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index 594f7e5..fb03df3 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.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.
diff --git a/.github/workflows/nodejs.yml b/.github/workflows/nodejs.yml
index ec00053..db8f34b 100644
--- a/.github/workflows/nodejs.yml
+++ b/.github/workflows/nodejs.yml
@@ -8,10 +8,10 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [14.x, 16.x, "18.10", 19.x]
+        node-version: [18.x, 20.x, 21.x]
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Use Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v3
         with:
diff --git a/.github/workflows/npmpublish.yml b/.github/workflows/npmpublish.yml
index c072f03..d60b936 100644
--- a/.github/workflows/npmpublish.yml
+++ b/.github/workflows/npmpublish.yml
@@ -8,10 +8,10 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-node@v3
         with:
-          node-version: "18.10"
+          node-version: 20
       - run: npm ci
       - run: npm test
 
@@ -19,10 +19,10 @@ jobs:
     needs: build
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@4
       - uses: actions/setup-node@v3
         with:
-          node-version: "18.10"
+          node-version: 20
           registry-url: https://registry.npmjs.org/
       - run: npm ci
       - run: npm run build --if-present
diff --git a/.github/workflows/sonarcloud.yml b/.github/workflows/sonarcloud.yml
index d1db554..bfaa66a 100644
--- a/.github/workflows/sonarcloud.yml
+++ b/.github/workflows/sonarcloud.yml
@@ -8,10 +8,10 @@ jobs:
 
     strategy:
       matrix:
-        node-version: ["18.10"]
+        node-version: [20.x]
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Use Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v3
         with: