diff --git a/tests/envs/svelte3/node18/package.json b/tests/envs/svelte3/node18/package.json
index b0b9b88..d9780d1 100644
--- a/tests/envs/svelte3/node18/package.json
+++ b/tests/envs/svelte3/node18/package.json
@@ -13,7 +13,7 @@
     "@testing-library/user-event": "^14.6.1",
     "@vitest/coverage-v8": "0.x.x",
     "expect-type": "^1.2.1",
-    "happy-dom": "17.6.1",
+    "happy-dom": "20.8.8",
     "jest": "^29.7.0",
     "jest-environment-jsdom": "^29.7.0",
     "jsdom": "^26.1.0",