diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index 0970ede..7fc5d58 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -10,7 +10,7 @@ jobs:
       - name: Install Node.js
         uses: actions/setup-node@v3
         with:
-          node-version: '18'
+          node-version: '20'
 
       - name: Install web dependencies
         run: npm ci
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 1f4d0b5..2645f58 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -10,7 +10,7 @@ jobs:
       - name: Setup Node.js environment
         uses: actions/setup-node@v4.0.1
         with:
-          node-version: '18'
+          node-version: '20'
 
       - name: Checkout
         uses: actions/checkout@v4
@@ -28,7 +28,7 @@ jobs:
       - name: Setup Node.js environment
         uses: actions/setup-node@v4.0.1
         with:
-          node-version: '18'
+          node-version: '20'
 
       - name: Checkout
         uses: actions/checkout@v4
@@ -47,7 +47,7 @@ jobs:
       - name: Setup Node.js environment
         uses: actions/setup-node@v4.0.1
         with:
-          node-version: '18'
+          node-version: '20'
 
       - name: Checkout
         uses: actions/checkout@v4
diff --git a/.github/workflows/update-firestore.yml b/.github/workflows/update-firestore.yml
index 54841e8..72d2b53 100644
--- a/.github/workflows/update-firestore.yml
+++ b/.github/workflows/update-firestore.yml
@@ -1,4 +1,4 @@
-name: "{Reusable} Update Firestore Test Dependencies"
+name: '{Reusable} Update Firestore Test Dependencies'
 on:
   workflow_call:
     secrets:
@@ -18,7 +18,7 @@ jobs:
       - name: Setup node
         uses: actions/setup-node@v4
         with:
-          node-version: "18"
+          node-version: '20'
 
       - name: Checkout code
         uses: actions/checkout@v4
@@ -33,9 +33,9 @@ jobs:
       - name: Create Pull Request
         uses: peter-evans/create-pull-request@v6
         with:
-          token: "${{ secrets.GH_PAT }}"
-          add-paths: "firestore/package*.json"
+          token: '${{ secrets.GH_PAT }}'
+          add-paths: 'firestore/package*.json'
           commit-message: npm update (firestore)
           title: npm update (firstore)
           branch: update-firestore
-          author: "github-actions <github-actions@github.com>"
+          author: 'github-actions <github-actions@github.com>'
diff --git a/.github/workflows/update-func.yml b/.github/workflows/update-func.yml
index 7416c58..c099af3 100644
--- a/.github/workflows/update-func.yml
+++ b/.github/workflows/update-func.yml
@@ -1,4 +1,4 @@
-name: "{Reusable} Update Cloud Functions dependencies"
+name: '{Reusable} Update Cloud Functions dependencies'
 on:
   workflow_call:
     secrets:
@@ -18,7 +18,7 @@ jobs:
       - name: Setup node
         uses: actions/setup-node@v4
         with:
-          node-version: "18"
+          node-version: '20'
 
       - name: Checkout code
         uses: actions/checkout@v4
@@ -33,9 +33,9 @@ jobs:
       - name: Create Pull Request
         uses: peter-evans/create-pull-request@v6
         with:
-          token: "${{ secrets.GH_PAT }}"
-          add-paths: "functions/package*.json"
+          token: '${{ secrets.GH_PAT }}'
+          add-paths: 'functions/package*.json'
           commit-message: npm update (functions)
           title: npm update (functions)
           branch: update-functions
-          author: "github-actions <github-actions@github.com>"
+          author: 'github-actions <github-actions@github.com>'
diff --git a/.github/workflows/update-web.yml b/.github/workflows/update-web.yml
index 0ee16a3..6ceaa8d 100644
--- a/.github/workflows/update-web.yml
+++ b/.github/workflows/update-web.yml
@@ -1,4 +1,4 @@
-name: "{Reusable} Update Web dependencies"
+name: '{Reusable} Update Web dependencies'
 on:
   workflow_call:
     secrets:
@@ -24,7 +24,7 @@ jobs:
       - name: Setup node
         uses: actions/setup-node@v4
         with:
-          node-version: "18"
+          node-version: '20'
 
       - name: Cache node deps
         uses: actions/cache@v4
@@ -32,7 +32,9 @@ jobs:
           cache-name: cache-web-node-deps
         with:
           path: ~/.npm
-          key: ${{ runner.os }}-${{ env.cache-name }}-${{ hashFiles('web/package-lock.json') }}
+          key:
+            ${{ runner.os }}-${{ env.cache-name }}-${{
+            hashFiles('web/package-lock.json') }}
 
       - name: npm update
         run: |
@@ -44,9 +46,9 @@ jobs:
       - name: Create Pull Request
         uses: peter-evans/create-pull-request@v6
         with:
-          token: "${{ secrets.GH_PAT }}"
-          add-paths: "web/package*.json"
+          token: '${{ secrets.GH_PAT }}'
+          add-paths: 'web/package*.json'
           commit-message: npm update (web)
           title: npm update (web)
           branch: update-web
-          author: "github-actions <github-actions@github.com>"
+          author: 'github-actions <github-actions@github.com>'
diff --git a/.nvmrc b/.nvmrc
index 3c03207..209e3ef 100644
--- a/.nvmrc
+++ b/.nvmrc
@@ -1 +1 @@
-18
+20
diff --git a/data/js/package-lock.json b/data/js/package-lock.json
index ed916c6..4cb25c0 100644
--- a/data/js/package-lock.json
+++ b/data/js/package-lock.json
@@ -25,9 +25,6 @@
         "ts-api-utils": "1.3.0",
         "ts-jest": "29.1",
         "typescript": "5.4.2"
-      },
-      "engines": {
-        "node": ">= 18.12 <19"
       }
     },
     "node_modules/@aashutoshrathi/word-wrap": {
diff --git a/data/js/package.json b/data/js/package.json
index 1d69a1e..671dd53 100644
--- a/data/js/package.json
+++ b/data/js/package.json
@@ -1,9 +1,6 @@
 {
   "name": "open-ics-data",
   "type": "module",
-  "engines": {
-    "node": ">= 18.12 <19"
-  },
   "dependencies": {
     "firebase-admin": "12.0.0",
     "node-xlsx": "^0.23.0",
diff --git a/firestore/package-lock.json b/firestore/package-lock.json
index 32e8769..b204a7e 100644
--- a/firestore/package-lock.json
+++ b/firestore/package-lock.json
@@ -11,7 +11,7 @@
         "mocha": "10.4.0"
       },
       "engines": {
-        "node": ">= 18"
+        "node": ">= 20"
       }
     },
     "node_modules/@apidevtools/json-schema-ref-parser": {
diff --git a/firestore/package.json b/firestore/package.json
index d13785a..10acfa2 100644
--- a/firestore/package.json
+++ b/firestore/package.json
@@ -3,7 +3,7 @@
     "test": "firebase emulators:exec --project=open-ics --only=firestore 'mocha --exit firestore.spec.js'"
   },
   "engines": {
-    "node": ">= 18"
+    "node": ">= 20"
   },
   "devDependencies": {
     "@firebase/rules-unit-testing": "3.0.3",
diff --git a/functions/package-lock.json b/functions/package-lock.json
index 1b1480b..a5d69de 100644
--- a/functions/package-lock.json
+++ b/functions/package-lock.json
@@ -23,7 +23,7 @@
         "typescript": "5.4.5"
       },
       "engines": {
-        "node": "18"
+        "node": "20"
       }
     },
     "node_modules/@ampproject/remapping": {
diff --git a/functions/package.json b/functions/package.json
index cb51ebd..5272a78 100644
--- a/functions/package.json
+++ b/functions/package.json
@@ -12,7 +12,7 @@
     "test": "npm run build && mocha --reporter spec ./build/ --recursive"
   },
   "engines": {
-    "node": "18"
+    "node": "20"
   },
   "main": "build/src/index.js",
   "dependencies": {
diff --git a/web/package-lock.json b/web/package-lock.json
index 3b94716..59437c4 100644
--- a/web/package-lock.json
+++ b/web/package-lock.json
@@ -40,7 +40,7 @@
         "typescript": "5.4.5"
       },
       "engines": {
-        "node": ">=18"
+        "node": ">=20"
       }
     },
     "node_modules/@ampproject/remapping": {
diff --git a/web/package.json b/web/package.json
index 52cc7f5..00d2acf 100644
--- a/web/package.json
+++ b/web/package.json
@@ -10,7 +10,7 @@
   },
   "private": true,
   "engines": {
-    "node": ">=18"
+    "node": ">=20"
   },
   "dependencies": {
     "@angular/animations": "18.0.2",