diff --git a/package.json b/package.json
index b2dca3ec..375f8778 100644
--- a/package.json
+++ b/package.json
@@ -37,7 +37,7 @@
     "eslint-plugin-vue": "^10.11.1",
     "eslint-plugin-vuejs-accessibility": "^2.6.2",
     "globals": "^17.13.0",
-    "happy-dom": "^20.14.6",
+    "happy-dom": "^21.0.1",
     "lightningcss": "^1.33.0",
     "sass": "^1.105.1",
     "start-server-and-test": "^3.0.13",
diff --git a/yarn.lock b/yarn.lock
index f4070ecf..a6da1ab0 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2303,10 +2303,10 @@ graceful-fs@^4.1.6, graceful-fs@^4.2.0:
   resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.2.11.tgz#4183e4e8bf08bb6e05bbb2f7d2e0c8f712ca40e3"
   integrity sha512-RbJ5/jmFcNNCcDV5o9eTnBLJ/HszWV0P73bc+Ff4nS/rJj+YaS6IGyiOL0VoBYX+l1Wrl3k63h/KrH+nhJ0XvQ==
 
-happy-dom@^20.14.6:
-  version "20.14.6"
-  resolved "https://registry.yarnpkg.com/happy-dom/-/happy-dom-20.14.6.tgz#3178d189d6fa13b010e913c8739b9e61a959869c"
-  integrity sha512-5DDsf4QmEIlRL6NkCv/fxSjYHHkZceL/IaYQdJc2h3G7DRTEai++VTjbfL0LB9geW2VrA3+vrjF3Efx+OTtX0Q==
+happy-dom@^21.0.1:
+  version "21.0.1"
+  resolved "https://registry.yarnpkg.com/happy-dom/-/happy-dom-21.0.1.tgz#c3577fb0553f3b8d3a6d86be4971b09541c6d12e"
+  integrity sha512-pRBs/u9fhrncyByOl58DMex0R2uAj6ZPKWIjV5j5yNGZBqLw3P6BTRhlc0DD5b/Ht4/6JYTMuE2LJhUWRC6SGw==
   dependencies:
     "@types/node" ">=20.0.0"
     "@types/whatwg-mimetype" "^3.0.2"
@@ -3731,12 +3731,7 @@ slice-ansi@^8.0.0:
     ansi-styles "^6.2.3"
     is-fullwidth-code-point "^5.1.0"
 
-"source-map-js@>=0.6.2 <2.0.0", source-map-js@^1.2.1:
-  version "1.2.2"
-  resolved "https://registry.yarnpkg.com/source-map-js/-/source-map-js-1.2.2.tgz#79fb88d97535a21cb27162cb05d211b67acea4ab"
-  integrity sha512-KGj/8Y43x35aZVDtt+J4mK1hoLGHULMYfSkODJNQjNDC3oW1PqPoxMwo0pLUsWM/UEGzON/NxeHywEfNXNP3Vw==
-
-source-map-js@^1.2.2:
+"source-map-js@>=0.6.2 <2.0.0", source-map-js@^1.2.1, source-map-js@^1.2.2:
   version "1.2.2"
   resolved "https://registry.yarnpkg.com/source-map-js/-/source-map-js-1.2.2.tgz#79fb88d97535a21cb27162cb05d211b67acea4ab"
   integrity sha512-KGj/8Y43x35aZVDtt+J4mK1hoLGHULMYfSkODJNQjNDC3oW1PqPoxMwo0pLUsWM/UEGzON/NxeHywEfNXNP3Vw==