diff --git a/package-lock.json b/package-lock.json
index b173006dd..df71296f6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -32,7 +32,7 @@
         "@vitest/coverage-istanbul": "^3.2.4",
         "@vue/test-utils": "^1.3.6",
         "@vue/tsconfig": "^0.5.1",
-        "happy-dom": "^19.0.2",
+        "happy-dom": "^20.0.0",
         "typescript": "^5.9.3",
         "vite": "^7.1.9",
         "vitest": "^3.0.2"
@@ -6353,9 +6353,9 @@
       "license": "MIT"
     },
     "node_modules/happy-dom": {
-      "version": "19.0.2",
-      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-19.0.2.tgz",
-      "integrity": "sha512-831CLbgDyjRbd2lApHZFsBDe56onuFcjsCBPodzWpzedTpeDr8CGZjs7iEIdNW1DVwSFRecfwzLpVyGBPamwGA==",
+      "version": "20.0.0",
+      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-20.0.0.tgz",
+      "integrity": "sha512-GkWnwIFxVGCf2raNrxImLo397RdGhLapj5cT3R2PT7FwL62Ze1DROhzmYW7+J3p9105DYMVenEejEbnq5wA37w==",
       "dev": true,
       "dependencies": {
         "@types/node": "^20.0.0",
diff --git a/package.json b/package.json
index a633caa19..c81951fc5 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
     "@vitest/coverage-istanbul": "^3.2.4",
     "@vue/test-utils": "^1.3.6",
     "@vue/tsconfig": "^0.5.1",
-    "happy-dom": "^19.0.2",
+    "happy-dom": "^20.0.0",
     "typescript": "^5.9.3",
     "vite": "^7.1.9",
     "vitest": "^3.0.2"