diff --git a/.github/workflows/cypress.yml b/.github/workflows/cypress.yml
index 290fbf4ae0..cb1bb4647c 100644
--- a/.github/workflows/cypress.yml
+++ b/.github/workflows/cypress.yml
@@ -12,13 +12,37 @@ jobs:
         uses: pnpm/action-setup@v2
         with:
           version: 8
+      - name: Setup Node
+        uses: actions/setup-node@v3
+        with:
+          node-version-file: './web/.node-version'
+      - name: Cache Cypress binary
+        id: cache-cypress
+        uses: actions/cache@v3
+        with:
+          path: ~/.cache/Cypress
+          key: ${{ runner.os }}-cypress-${{ hashFiles('./web/pnpm-lock.yaml') }}
+      - name: Restore node_modules for web
+        id: cache-web
+        uses: actions/cache@v3
+        with:
+          path: web/node_modules
+          key: ${{ runner.os }}-node_modules-${{ hashFiles('./web/pnpm-lock.yaml') }}
+      - name: Install web dependencies
+        if: steps.cache-web.outputs.cache-hit != 'true'
+        run: pnpm install --frozen-lockfile
+        working-directory: ./web
+      - name: Install Cypress binary
+        if: steps.cache-cypress.outputs.cache-hit != 'true'
+        run: pnpm exec cypress install
+        working-directory: ./web
       - name: Cypress run component tests
         uses: cypress-io/github-action@v6
         env:
           TZ: Europe/Copenhagen
         with:
           working-directory: ./web
-          install: true
+          install: false
           # to run component tests we need to use "component: true"
           component: true
       - name: Upload screenshots
@@ -38,12 +62,37 @@ jobs:
         uses: pnpm/action-setup@v2
         with:
           version: 8
+      - name: Setup Node
+        uses: actions/setup-node@v3
+        with:
+          node-version-file: './web/.node-version'
+      - name: Cache Cypress binary
+        id: cache-cypress
+        uses: actions/cache@v3
+        with:
+          path: ~/.cache/Cypress
+          key: ${{ runner.os }}-cypress-${{ hashFiles('./web/pnpm-lock.yaml') }}
+      - name: Restore node_modules for web
+        id: cache-web
+        uses: actions/cache@v3
+        with:
+          path: web/node_modules
+          key: ${{ runner.os }}-node_modules-${{ hashFiles('./web/pnpm-lock.yaml') }}
+      - name: Install web dependencies
+        if: steps.cache-web.outputs.cache-hit != 'true'
+        run: pnpm install --frozen-lockfile
+        working-directory: ./web
+      - name: Install Cypress binary
+        if: steps.cache-cypress.outputs.cache-hit != 'true'
+        run: pnpm exec cypress install
+        working-directory: ./web
       - name: Cypress run e2e tests
         uses: cypress-io/github-action@v6
         env:
           TZ: Europe/Copenhagen
         with:
           working-directory: ./web
+          install: false
           build: pnpm run build --mode testing
           start: pnpm run preview
           config: baseUrl=http://127.0.0.1:4173/
diff --git a/.github/workflows/deploy-preview-branch.yml b/.github/workflows/deploy-preview-branch.yml
index f8730e1a8b..ae190dd216 100644
--- a/.github/workflows/deploy-preview-branch.yml
+++ b/.github/workflows/deploy-preview-branch.yml
@@ -21,10 +21,10 @@ jobs:
         uses: pnpm/action-setup@v2
         with:
           version: 8
-      - name: Setup Node v18.x
+      - name: Setup Node
         uses: actions/setup-node@v3
         with:
-          node-version: 18
+          node-version-file: './web/.node-version'
       - name: Restore node_modules for web
         id: cache-web
         uses: actions/cache@v3
diff --git a/.github/workflows/deploy-staging.yml b/.github/workflows/deploy-staging.yml
index 3a39c8ba5a..02b36bf154 100644
--- a/.github/workflows/deploy-staging.yml
+++ b/.github/workflows/deploy-staging.yml
@@ -17,10 +17,10 @@ jobs:
         uses: pnpm/action-setup@v2
         with:
           version: 8
-      - name: Setup Node v18.x
+      - name: Setup Node
         uses: actions/setup-node@v3
         with:
-          node-version: 18
+          node-version-file: './web/.node-version'
       - name: Restore node_modules for web
         id: cache-web
         uses: actions/cache@v3
diff --git a/.github/workflows/eslint.yml b/.github/workflows/eslint.yml
index ef7e752113..25bd00daf1 100644
--- a/.github/workflows/eslint.yml
+++ b/.github/workflows/eslint.yml
@@ -21,10 +21,10 @@ jobs:
         uses: pnpm/action-setup@v2
         with:
           version: 8
-      - name: Setup Node v18.x
+      - name: Setup Node
         uses: actions/setup-node@v3
         with:
-          node-version: 18
+          node-version-file: './web/.node-version'
       - name: Restore node_modules for web
         id: cache-web
         uses: actions/cache@v3
diff --git a/.github/workflows/jsonlint.yml b/.github/workflows/jsonlint.yml
index b3ee41e351..b1e3b93e69 100644
--- a/.github/workflows/jsonlint.yml
+++ b/.github/workflows/jsonlint.yml
@@ -11,10 +11,10 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-      - name: Setup Node LTS
+      - name: Setup Node
         uses: actions/setup-node@v3
         with:
-          node-version: 18
+          node-version-file: './web/.node-version'
       - name: Install jsonlint-mod
         run: |
           npm install -g jsonlint-mod
diff --git a/.github/workflows/prettier.yml b/.github/workflows/prettier.yml
index 186350697e..c6552ec5a2 100644
--- a/.github/workflows/prettier.yml
+++ b/.github/workflows/prettier.yml
@@ -15,10 +15,10 @@ jobs:
         uses: pnpm/action-setup@v2
         with:
           version: 8
-      - name: Setup Node v18.x
+      - name: Setup Node
         uses: actions/setup-node@v3
         with:
-          node-version: 18
+          node-version-file: './web/.node-version'
       - name: Restore node_modules for web
         id: cache-web
         uses: actions/cache@v3
diff --git a/.github/workflows/typecheck.yml b/.github/workflows/typecheck.yml
index e77aa71cea..58df5566f6 100644
--- a/.github/workflows/typecheck.yml
+++ b/.github/workflows/typecheck.yml
@@ -16,10 +16,10 @@ jobs:
         uses: pnpm/action-setup@v2
         with:
           version: 8
-      - name: Setup Node v18.x
+      - name: Setup Node
         uses: actions/setup-node@v3
         with:
-          node-version: 18
+          node-version-file: './web/.node-version'
       - name: Restore node_modules for web
         id: cache-web
         uses: actions/cache@v3
diff --git a/.github/workflows/unit_test.yml b/.github/workflows/unit_test.yml
index fdbf74b41b..8a5cd99c73 100644
--- a/.github/workflows/unit_test.yml
+++ b/.github/workflows/unit_test.yml
@@ -16,10 +16,10 @@ jobs:
         uses: pnpm/action-setup@v2
         with:
           version: 8
-      - name: Setup Node v18.x
+      - name: Setup Node
         uses: actions/setup-node@v3
         with:
-          node-version: 18
+          node-version-file: './web/.node-version'
       - name: Restore node_modules for web
         id: cache-web
         uses: actions/cache@v3
diff --git a/.github/workflows/validate_generate_files.yml b/.github/workflows/validate_generate_files.yml
index 2800b208c2..0fc5f3c6aa 100644
--- a/.github/workflows/validate_generate_files.yml
+++ b/.github/workflows/validate_generate_files.yml
@@ -16,10 +16,10 @@ jobs:
         uses: pnpm/action-setup@v2
         with:
           version: 8
-      - name: Setup Node v18.x
+      - name: Setup Node
         uses: actions/setup-node@v3
         with:
-          node-version: 18
+          node-version-file: './web/.node-version'
       - name: Restore node_modules for web
         id: cache-web
         uses: actions/cache@v3
diff --git a/.github/workflows/validate_generated_files.yml b/.github/workflows/validate_generated_files.yml
index 164bfa29ff..2a2493e005 100644
--- a/.github/workflows/validate_generated_files.yml
+++ b/.github/workflows/validate_generated_files.yml
@@ -16,10 +16,10 @@ jobs:
         uses: pnpm/action-setup@v2
         with:
           version: 8
-      - name: Setup Node v18.x
+      - name: Setup Node
         uses: actions/setup-node@v3
         with:
-          node-version: 18
+          node-version-file: './web/.node-version'
       - name: Restore node_modules
         id: cache
         uses: actions/cache@v3
diff --git a/mockserver/.node-version b/mockserver/.node-version
new file mode 100644
index 0000000000..209e3ef4b6
--- /dev/null
+++ b/mockserver/.node-version
@@ -0,0 +1 @@
+20
diff --git a/web/.node-version b/web/.node-version
new file mode 100644
index 0000000000..209e3ef4b6
--- /dev/null
+++ b/web/.node-version
@@ -0,0 +1 @@
+20
diff --git a/web/package.json b/web/package.json
index cb3c8522bf..51233c6230 100644
--- a/web/package.json
+++ b/web/package.json
@@ -14,8 +14,8 @@
     "build": "pnpm update-version && vite build",
     "update-version": "echo '{\"version\": \"'$npm_package_version'\"}' > public/client-version.json",
     "create-generated-files": "pnpm run generate-world && pnpm run generate-zones-config",
-    "generate-world": "ts-node --esm ./geo/generateWorld.ts",
-    "generate-zones-config": "ts-node --esm ./scripts/generateZonesConfig.ts",
+    "generate-world": "node --import=./scripts/register-tsNodeESM.js ./geo/generateWorld.ts",
+    "generate-zones-config": "node --import=./scripts/register-tsNodeESM.js ./scripts/generateZonesConfig.ts",
     "predev": "pnpm run create-generated-files",
     "dev": "vite --open",
     "cy:component": "cypress open --component -b electron",
@@ -195,7 +195,7 @@
     "workbox-window": "7.0.0"
   },
   "engines": {
-    "node": ">=18",
+    "node": "^20",
     "pnpm": "^8"
   }
 }
diff --git a/web/scripts/register-tsNodeESM.js b/web/scripts/register-tsNodeESM.js
new file mode 100644
index 0000000000..b4124d0e8e
--- /dev/null
+++ b/web/scripts/register-tsNodeESM.js
@@ -0,0 +1,8 @@
+/**
+ * This script is meant to be used with 'node --import=register-tsNodeESM.js', and allows
+ * node v20 to use ts-node to execute Typescript files that contain ESM modules, without
+ * outputting JS files.
+ */
+import { register } from 'node:module';
+import { pathToFileURL } from 'node:url';
+register('ts-node/esm', pathToFileURL('./'));