diff --git a/app/package-lock.json b/app/package-lock.json
index aa04055f..23c659db 100644
--- a/app/package-lock.json
+++ b/app/package-lock.json
@@ -47,7 +47,7 @@
         "eslint": "^10.12.0",
         "eslint-config-prettier": "^10.1.8",
         "globals": "^17.13.0",
-        "happy-dom": "^20.14.5",
+        "happy-dom": "^21.0.1",
         "msw": "^3.0.3",
         "postcss-nesting": "^14.0.3",
         "prettier": "^3.9.10",
@@ -4437,9 +4437,9 @@
       }
     },
     "node_modules/happy-dom": {
-      "version": "20.14.5",
-      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-20.14.5.tgz",
-      "integrity": "sha512-x/RzkpWO40bTjIoT30iQtt64FLLmH/iRcUCN2X//bLx7H3ifkdfPXyqsro/OYtqzIAhiLMMA7mmiOR9C3NOKjQ==",
+      "version": "21.0.1",
+      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-21.0.1.tgz",
+      "integrity": "sha512-pRBs/u9fhrncyByOl58DMex0R2uAj6ZPKWIjV5j5yNGZBqLw3P6BTRhlc0DD5b/Ht4/6JYTMuE2LJhUWRC6SGw==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
diff --git a/app/package.json b/app/package.json
index cc9c0777..fea1ead1 100644
--- a/app/package.json
+++ b/app/package.json
@@ -69,7 +69,7 @@
     "eslint": "^10.12.0",
     "eslint-config-prettier": "^10.1.8",
     "globals": "^17.13.0",
-    "happy-dom": "^20.14.5",
+    "happy-dom": "^21.0.1",
     "msw": "^3.0.3",
     "postcss-nesting": "^14.0.3",
     "prettier": "^3.9.10",