diff --git a/web/package.json b/web/package.json
index 51a2d670a..f807e8e88 100644
--- a/web/package.json
+++ b/web/package.json
@@ -46,7 +46,7 @@
     "geo-coordinates-parser": "^1.7.4",
     "geojson": "^0.5.0",
     "handlebars": "^4.7.8",
-    "happy-dom": "^20.0.0",
+    "happy-dom": "^21.0.0",
     "hash-wasm": "^4.12.0",
     "hls-video-element": "^1.5.11",
     "hls.js": "^1.6.16",
@@ -105,7 +105,7 @@
     "eslint-plugin-unicorn": "^75.0.0",
     "factory.ts": "^1.4.1",
     "globals": "^17.0.0",
-    "happy-dom": "^20.0.0",
+    "happy-dom": "^21.0.0",
     "prettier": "^3.7.4",
     "prettier-plugin-sort-json": "^4.1.1",
     "prettier-plugin-svelte": "^4.0.0",