diff --git a/clients/react/package.json b/clients/react/package.json
index b346f966..8e93cede 100644
--- a/clients/react/package.json
+++ b/clients/react/package.json
@@ -53,7 +53,7 @@
     "@testing-library/react": "^16.3.2",
     "@types/react": "^19.0.0",
     "@types/react-dom": "^19.0.0",
-    "happy-dom": "^20.9.0",
+    "happy-dom": "^21.0.3",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
     "tsup": "^8.0.0",