diff --git a/tests/package.json b/tests/package.json
index 1083747..919e385 100644
--- a/tests/package.json
+++ b/tests/package.json
@@ -16,7 +16,7 @@
     "@types/react-dom": "19.0.3",
     "@vitest/coverage-v8": "3.0.2",
     "@vitest/ui": "3.0.2",
-    "happy-dom": "16.6.0",
+    "happy-dom": "20.0.0",
     "lodash.throttle": "4.1.1",
     "microdiff": "1.5.0",
     "react": "19.0.0",