diff --git a/package-lock.json b/package-lock.json
index 76cd7b6e..49daa4fd 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -33,7 +33,7 @@
         "@vue/test-utils": "^2.4.6",
         "@vue/tsconfig": "^0.8.1",
         "browserslist": "^4.28.1",
-        "happy-dom": "^20.7.0",
+        "happy-dom": "^20.8.3",
         "typescript": "^5.9.3",
         "vite": "^7.3.1",
         "vitest": "^4.0.13"
@@ -6310,9 +6310,9 @@
       "license": "ISC"
     },
     "node_modules/happy-dom": {
-      "version": "20.7.0",
-      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-20.7.0.tgz",
-      "integrity": "sha512-hR/uLYQdngTyEfxnOoa+e6KTcfBFyc1hgFj/Cc144A5JJUuHFYqIEBDcD4FeGqUeKLRZqJ9eN9u7/GDjYEgS1g==",
+      "version": "20.8.3",
+      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-20.8.3.tgz",
+      "integrity": "sha512-lMHQRRwIPyJ70HV0kkFT7jH/gXzSI7yDkQFe07E2flwmNDFoWUTRMKpW2sglsnpeA7b6S2TJPp98EbQxai8eaQ==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
diff --git a/package.json b/package.json
index d48e12ab..0f605297 100644
--- a/package.json
+++ b/package.json
@@ -42,7 +42,7 @@
     "@vue/test-utils": "^2.4.6",
     "@vue/tsconfig": "^0.8.1",
     "browserslist": "^4.28.1",
-    "happy-dom": "^20.7.0",
+    "happy-dom": "^20.8.3",
     "typescript": "^5.9.3",
     "vite": "^7.3.1",
     "vitest": "^4.0.13"