diff --git a/examples/vite.config.ts b/examples/vite.config.ts
index 0dfd752..d5b28de 100644
--- a/examples/vite.config.ts
+++ b/examples/vite.config.ts
@@ -1,5 +1,6 @@
-import { setTimeout } from 'node:timers/promises'
 import { env } from 'node:process'
+import { setTimeout } from 'node:timers/promises'
+
 import react from '@vitejs/plugin-react'
 import { defineConfig } from 'vite'
 import tsconfigPaths from 'vite-tsconfig-paths'
@@ -27,10 +28,7 @@ export default defineConfig(async ({ command }) => {
   }
 })
 
-const setupEnv = async (
-  endpoint: string,
-  isBuild: boolean,
-): Promise<void> => {
+const setupEnv = async (endpoint: string, isBuild: boolean): Promise<void> => {
   env['SEAM_ENDPOINT'] ??= endpoint
 
   if (env['SEAM_PUBLISHABLE_KEY'] == null) {
@@ -40,7 +38,7 @@ const setupEnv = async (
         `> Using the default publishable key.
 > Use your own by setting SEAM_PUBLISHABLE_KEY in your environment.
 > Get one for free at https://console.seam.co/
-`
+`,
       )
       await setTimeout(2000)
     }
diff --git a/package-lock.json b/package-lock.json
index 0580faa..3f0db42 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -33,7 +33,7 @@
         "eslint-config-standard-with-typescript": "^43.0.1",
         "eslint-plugin-simple-import-sort": "^12.0.0",
         "eslint-plugin-unused-imports": "^3.0.0",
-        "happy-dom": "^12.10.3",
+        "happy-dom": "^18.0.1",
         "prettier": "^3.0.0",
         "react": "^18.2.0",
         "react-dom": "^18.2.0",
@@ -1903,6 +1903,12 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@types/whatwg-mimetype": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/@types/whatwg-mimetype/-/whatwg-mimetype-3.0.2.tgz",
+      "integrity": "sha512-c2AKvDT8ToxLIOUlN51gTiHXflsfIFisS4pO7pDPoKouJCESkhZnEy623gwP9laCy5lnLDAw1vAzu2vM2YLOrA==",
+      "dev": true
+    },
     "node_modules/@typescript-eslint/eslint-plugin": {
       "version": "6.21.0",
       "resolved": "https://registry.npmjs.org/@typescript-eslint/eslint-plugin/-/eslint-plugin-6.21.0.tgz",
@@ -3257,13 +3263,6 @@
         "node": ">= 8"
       }
     },
-    "node_modules/css.escape": {
-      "version": "1.5.1",
-      "resolved": "https://registry.npmjs.org/css.escape/-/css.escape-1.5.1.tgz",
-      "integrity": "sha512-YUifsXXuknHlUsmlgyY0PKzgPOr7/FjCePfHNt0jxm83wHZi44VDMQ7/fGNkjY3/jV1MC+1CmZbaHzugyeRtpg==",
-      "dev": true,
-      "license": "MIT"
-    },
     "node_modules/csstype": {
       "version": "3.1.3",
       "resolved": "https://registry.npmjs.org/csstype/-/csstype-3.1.3.tgz",
@@ -5130,28 +5129,17 @@
       "license": "MIT"
     },
     "node_modules/happy-dom": {
-      "version": "12.10.3",
-      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-12.10.3.tgz",
-      "integrity": "sha512-JzUXOh0wdNGY54oKng5hliuBkq/+aT1V3YpTM+lrN/GoLQTANZsMaIvmHiHe612rauHvPJnDZkZ+5GZR++1Abg==",
+      "version": "18.0.1",
+      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-18.0.1.tgz",
+      "integrity": "sha512-qn+rKOW7KWpVTtgIUi6RVmTBZJSe2k0Db0vh1f7CWrWclkkc7/Q+FrOfkZIb2eiErLyqu5AXEzE7XthO9JVxRA==",
       "dev": true,
-      "license": "MIT",
       "dependencies": {
-        "css.escape": "^1.5.1",
-        "entities": "^4.5.0",
-        "iconv-lite": "^0.6.3",
-        "webidl-conversions": "^7.0.0",
-        "whatwg-encoding": "^2.0.0",
+        "@types/node": "^20.0.0",
+        "@types/whatwg-mimetype": "^3.0.2",
         "whatwg-mimetype": "^3.0.0"
-      }
-    },
-    "node_modules/happy-dom/node_modules/webidl-conversions": {
-      "version": "7.0.0",
-      "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-7.0.0.tgz",
-      "integrity": "sha512-VwddBukDzu71offAQR975unBIGqfKZpM+8ZX6ySk8nYhVoo5CYaZyzt3YBvYtRtO+aoGlqxPg/B87NGVZ/fu6g==",
-      "dev": true,
-      "license": "BSD-2-Clause",
+      },
       "engines": {
-        "node": ">=12"
+        "node": ">=20.0.0"
       }
     },
     "node_modules/has-bigints": {
@@ -5305,19 +5293,6 @@
         "url": "https://github.com/sponsors/wooorm"
       }
     },
-    "node_modules/iconv-lite": {
-      "version": "0.6.3",
-      "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.6.3.tgz",
-      "integrity": "sha512-4fCk79wshMdzMp2rH06qWrJE4iolqLhCUH+OiuIgU++RB0+94NlDL81atO7GX55uUKueo0txHNtvEyI6D7WdMw==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "safer-buffer": ">= 2.1.2 < 3.0.0"
-      },
-      "engines": {
-        "node": ">=0.10.0"
-      }
-    },
     "node_modules/ignore": {
       "version": "5.3.2",
       "resolved": "https://registry.npmjs.org/ignore/-/ignore-5.3.2.tgz",
@@ -7465,13 +7440,6 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
-    "node_modules/safer-buffer": {
-      "version": "2.1.2",
-      "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
-      "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==",
-      "dev": true,
-      "license": "MIT"
-    },
     "node_modules/scheduler": {
       "version": "0.23.2",
       "resolved": "https://registry.npmjs.org/scheduler/-/scheduler-0.23.2.tgz",
@@ -9169,19 +9137,6 @@
       "dev": true,
       "license": "MIT"
     },
-    "node_modules/whatwg-encoding": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/whatwg-encoding/-/whatwg-encoding-2.0.0.tgz",
-      "integrity": "sha512-p41ogyeMUrw3jWclHWTQg1k05DSVXPLcVxRTYsXUk+ZooOCZLcoYgPZ/HL/D/N+uQPOtcp1me1WhBEaX02mhWg==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "iconv-lite": "0.6.3"
-      },
-      "engines": {
-        "node": ">=12"
-      }
-    },
     "node_modules/whatwg-mimetype": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/whatwg-mimetype/-/whatwg-mimetype-3.0.0.tgz",
diff --git a/package.json b/package.json
index bf7746d..27bc36a 100644
--- a/package.json
+++ b/package.json
@@ -112,7 +112,7 @@
     "eslint-config-standard-with-typescript": "^43.0.1",
     "eslint-plugin-simple-import-sort": "^12.0.0",
     "eslint-plugin-unused-imports": "^3.0.0",
-    "happy-dom": "^12.10.3",
+    "happy-dom": "^18.0.1",
     "prettier": "^3.0.0",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",