diff --git a/.github/workflows/continuous-integration.yml b/.github/workflows/continuous-integration.yml
index a0d70785..d39ac3ce 100644
--- a/.github/workflows/continuous-integration.yml
+++ b/.github/workflows/continuous-integration.yml
@@ -136,7 +136,7 @@ jobs:
       - uses: "actions/setup-node@v4"
         with:
           check-latest: true
-          node-version: 20
+          node-version: 21
       - name: "Install node modules"
         run: "npm ci"
       - name: Run ESLint
@@ -149,8 +149,19 @@ jobs:
       - uses: "actions/setup-node@v4"
         with:
           check-latest: true
-          node-version: 20
+          node-version: 21
       - name: "Install node modules"
         run: "npm ci"
       - name: Run Jest
         run: "npm run test"
+
+  package-lock-up-to-date:
+    runs-on: "ubuntu-latest"
+    steps:
+      - uses: "actions/checkout@v4"
+      - uses: "actions/setup-node@v4"
+        with:
+          check-latest: true
+          node-version: 21
+      - name: "Check package-lock.json is up2date"
+        run: "npx --yes package-lock-utd"
diff --git a/Dockerfile b/Dockerfile
index 7e4b0dfb..b8748c52 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,6 +6,7 @@ COPY package*.json ./
 COPY tsconfig.json ./
 COPY webpack.config.ts ./
 RUN npm ci
+RUN apk add --no-cache jq && npx semver -r $(jq -r '.engines.node' package.json) $(node -v) || (echo "ERROR: Container node version is not allowed by projects package.json engine range." && exit 1)
 COPY ./src ./src
 RUN npm run build
 
diff --git a/package-lock.json b/package-lock.json
index e8727cac..d5e7d9c2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -32,7 +32,7 @@
                 "webpack-cli": "^5.0.0"
             },
             "engines": {
-                "node": "^20.2.0",
+                "node": "^21.7.0",
                 "npm": "^10.0.0"
             }
         },
diff --git a/package.json b/package.json
index 59fc1ae0..0bac52b3 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,7 @@
     },
     "engines": {
         "npm": "^10.0.0",
-        "node": "^20.2.0"
+        "node": "^21.7.0"
     },
     "dependencies": {
         "@actions/core": "^1.10.0",