diff --git a/package-lock.json b/package-lock.json
index 04001622..6b86a6cb 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -21,7 +21,7 @@
         "@types/node": "^25.0.9",
         "@vitest/coverage-v8": "^4.0.17",
         "eslint": "^9.39.2",
-        "happy-dom": "^20.0.11",
+        "happy-dom": "^20.3.1",
         "typescript": "^5.9.3",
         "vite": "^7.3.1",
         "vitest": "^4.0.7"
@@ -2115,6 +2115,16 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@types/ws": {
+      "version": "8.18.1",
+      "resolved": "https://registry.npmjs.org/@types/ws/-/ws-8.18.1.tgz",
+      "integrity": "sha512-ThVF6DCVhA8kUGy+aazFQ4kXQ7E1Ty7A3ypFOe0IcJV8O/M511G99AW24irKrW56Wt44yG9+ij8FaqoBGkuBXg==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
     "node_modules/@typescript-eslint/eslint-plugin": {
       "version": "8.48.0",
       "resolved": "https://registry.npmjs.org/@typescript-eslint/eslint-plugin/-/eslint-plugin-8.48.0.tgz",
@@ -4639,15 +4649,17 @@
       "license": "MIT"
     },
     "node_modules/happy-dom": {
-      "version": "20.0.11",
-      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-20.0.11.tgz",
-      "integrity": "sha512-QsCdAUHAmiDeKeaNojb1OHOPF7NjcWPBR7obdu3NwH2a/oyQaLg5d0aaCy/9My6CdPChYF07dvz5chaXBGaD4g==",
+      "version": "20.3.1",
+      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-20.3.1.tgz",
+      "integrity": "sha512-tLvsizNno05Hij0PoB0QN/S8xf0YU2AGvO11/JlJDw5McA/gzyn0Ni1RwbTI1/zteUbOekJH0t6q8HFvjbxsGg==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
         "@types/node": "^20.0.0",
         "@types/whatwg-mimetype": "^3.0.2",
-        "whatwg-mimetype": "^3.0.0"
+        "@types/ws": "^8.18.1",
+        "whatwg-mimetype": "^3.0.0",
+        "ws": "^8.18.3"
       },
       "engines": {
         "node": ">=20.0.0"
@@ -7965,6 +7977,28 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/ws": {
+      "version": "8.19.0",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-8.19.0.tgz",
+      "integrity": "sha512-blAT2mjOEIi0ZzruJfIhb3nps74PRWTCz1IjglWEEpQl5XS/UNama6u2/rjFkDDouqr4L67ry+1aGIALViWjDg==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=10.0.0"
+      },
+      "peerDependencies": {
+        "bufferutil": "^4.0.1",
+        "utf-8-validate": ">=5.0.2"
+      },
+      "peerDependenciesMeta": {
+        "bufferutil": {
+          "optional": true
+        },
+        "utf-8-validate": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/xml-name-validator": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/xml-name-validator/-/xml-name-validator-4.0.0.tgz",
diff --git a/package.json b/package.json
index 27dc05e5..fe9c8f44 100644
--- a/package.json
+++ b/package.json
@@ -60,7 +60,7 @@
     "@types/node": "^25.0.9",
     "@vitest/coverage-v8": "^4.0.17",
     "eslint": "^9.39.2",
-    "happy-dom": "^20.0.11",
+    "happy-dom": "^20.3.1",
     "typescript": "^5.9.3",
     "vite": "^7.3.1",
     "vitest": "^4.0.7"