diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 08566f8..b9a6684 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -17,7 +17,7 @@ jobs:
       - name: Setup Node
         uses: actions/setup-node@v3
         with:
-          node-version: 18
+          node-version: 20
       - name: Install dependencies
         run: npm ci
       - name: Run tests
@@ -34,7 +34,7 @@ jobs:
       - name: Setup Node
         uses: actions/setup-node@v3
         with:
-          node-version: 18
+          node-version: 20
       - name: Install dependencies
         run: npm ci
       - name: Install Playwright Browsers
diff --git a/.prettierignore b/.prettierignore
index d9ac84b..5ba6eae 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -4,3 +4,5 @@ backend/sendmessage/build
 frontend/dist
 frontend/dist-ssr
 backend/packaged.yaml
+.tool-versions
+.prettierignore
diff --git a/.tool-versions b/.tool-versions
index fa7162c..7bd5f0b 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1,2 +1 @@
-nodejs lts-gallium
-# Gallium = Node v16
+nodejs 20.10.0
diff --git a/package-lock.json b/package-lock.json
index 75d52cb..afd0bb2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -19,7 +19,7 @@
         "@testing-library/jest-dom": "^6.1.3",
         "@testing-library/preact": "^3.2.3",
         "@types/aws-lambda": "^8.10.121",
-        "@types/node": "^18.17.15",
+        "@types/node": "20.0.0",
         "@types/ws": "^8.5.5",
         "@typescript-eslint/eslint-plugin": "^6.7.0",
         "@typescript-eslint/parser": "^6.7.0",
@@ -48,8 +48,8 @@
         "ws": "^8.14.1"
       },
       "engines": {
-        "node": ">=18.0.0",
-        "npm": ">=9.0.0"
+        "node": ">=20.0.0",
+        "npm": ">=10.0.0"
       }
     },
     "node_modules/@aashutoshrathi/word-wrap": {
@@ -2293,9 +2293,9 @@
       "integrity": "sha512-Hr5Jfhc9eYOQNPYO5WLDq/n4jqijdHNlDXjuAQkkt+mWdQR+XJToOHrsD4cPaMXpn6KO7y2+wM8AZEs8VpBLVA=="
     },
     "node_modules/@types/node": {
-      "version": "18.17.15",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-18.17.15.tgz",
-      "integrity": "sha512-2yrWpBk32tvV/JAd3HNHWuZn/VDN1P+72hWirHnvsvTGSqbANi+kSeuQR9yAHnbvaBvHDsoTdXV0Fe+iRtHLKA=="
+      "version": "20.0.0",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-20.0.0.tgz",
+      "integrity": "sha512-cD2uPTDnQQCVpmRefonO98/PPijuOnnEy5oytWJFPY1N9aJCz2wJ5kSGWO+zJoed2cY2JxQh6yBuUq4vIn61hw=="
     },
     "node_modules/@types/semver": {
       "version": "7.5.2",
@@ -9793,9 +9793,9 @@
       "integrity": "sha512-Hr5Jfhc9eYOQNPYO5WLDq/n4jqijdHNlDXjuAQkkt+mWdQR+XJToOHrsD4cPaMXpn6KO7y2+wM8AZEs8VpBLVA=="
     },
     "@types/node": {
-      "version": "18.17.15",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-18.17.15.tgz",
-      "integrity": "sha512-2yrWpBk32tvV/JAd3HNHWuZn/VDN1P+72hWirHnvsvTGSqbANi+kSeuQR9yAHnbvaBvHDsoTdXV0Fe+iRtHLKA=="
+      "version": "20.0.0",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-20.0.0.tgz",
+      "integrity": "sha512-cD2uPTDnQQCVpmRefonO98/PPijuOnnEy5oytWJFPY1N9aJCz2wJ5kSGWO+zJoed2cY2JxQh6yBuUq4vIn61hw=="
     },
     "@types/semver": {
       "version": "7.5.2",
diff --git a/package.json b/package.json
index fee36bd..b1d4b60 100644
--- a/package.json
+++ b/package.json
@@ -41,7 +41,7 @@
     "@testing-library/jest-dom": "^6.1.3",
     "@testing-library/preact": "^3.2.3",
     "@types/aws-lambda": "^8.10.121",
-    "@types/node": "^18.17.15",
+    "@types/node": "20.0.0",
     "@types/ws": "^8.5.5",
     "@typescript-eslint/eslint-plugin": "^6.7.0",
     "@typescript-eslint/parser": "^6.7.0",
@@ -70,7 +70,7 @@
     "ws": "^8.14.1"
   },
   "engines": {
-    "node": ">=18.0.0",
-    "npm": ">=9.0.0"
+    "node": ">=20.0.0",
+    "npm": ">=10.0.0"
   }
 }