diff --git a/frontend/packages/erd-core/package.json b/frontend/packages/erd-core/package.json
index 84d4ff21d2..275539acb1 100644
--- a/frontend/packages/erd-core/package.json
+++ b/frontend/packages/erd-core/package.json
@@ -42,7 +42,7 @@
     "@types/react": "19.2.2",
     "@vitejs/plugin-react": "4.6.0",
     "eslint": "9.38.0",
-    "happy-dom": "20.0.0",
+    "happy-dom": "20.8.8",
     "typed-css-modules": "0.9.1",
     "typescript": "5.9.3",
     "vitest": "3.2.4"