diff --git a/package.json b/package.json
index 078a270db..e05e3e79d 100644
--- a/package.json
+++ b/package.json
@@ -73,7 +73,7 @@
     "eslint-plugin-vuetify": "2.7.3",
     "express": "5.3.0",
     "express-ws": "5.0.2",
-    "happy-dom": "20.14.6",
+    "happy-dom": "21.0.4",
     "istanbul-lib-coverage": "3.2.2",
     "json-server": "0.17.4",
     "nodemon": "3.1.14",
diff --git a/yarn.lock b/yarn.lock
index b8cae7cea..ef216ba68 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3786,7 +3786,7 @@ __metadata:
     graphiql: "npm:4.1.2"
     graphql: "npm:17.0.2"
     graphql-tag: "npm:2.12.7"
-    happy-dom: "npm:20.14.6"
+    happy-dom: "npm:21.0.4"
     istanbul-lib-coverage: "npm:3.2.2"
     json-server: "npm:0.17.4"
     lodash-es: "npm:4.18.1"
@@ -5711,9 +5711,9 @@ __metadata:
   languageName: node
   linkType: hard
 
-"happy-dom@npm:20.14.6":
-  version: 20.14.6
-  resolution: "happy-dom@npm:20.14.6"
+"happy-dom@npm:21.0.4":
+  version: 21.0.4
+  resolution: "happy-dom@npm:21.0.4"
   dependencies:
     "@types/node": "npm:>=20.0.0"
     "@types/whatwg-mimetype": "npm:^3.0.2"
@@ -5722,7 +5722,7 @@ __metadata:
     entities: "npm:^7.0.1"
     whatwg-mimetype: "npm:^3.0.0"
     ws: "npm:^8.21.0"
-  checksum: 10c0/47bdcb7ec7f22c7270b5c1e8b25bb9cd847aa35ee84d6e0870123463db63ad335fa2eb9e6d15a6e3b2ad843586139a0e2fbc6d6dfc120ff0f91f693efea74e4d
+  checksum: 10c0/9368af9739a5ba07776a116368d13d6b2690de81a6525096a1fec36e4cd1270b569151d021e2a56fb314fba73674572de562f1364090b01df6c68e9843b002e8
   languageName: node
   linkType: hard