diff --git a/package-lock.json b/package-lock.json
index 35552f994..683bc0deb 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -31,7 +31,7 @@
         "eslint-plugin-tsdoc": "^0.2.17",
         "eslint-plugin-vitest": "^0.3.20",
         "grpc-web": "^1.4.2",
-        "happy-dom": "^15.10.1",
+        "happy-dom": "^20.0.0",
         "npm-check-updates": "^17.1.11",
         "prettier": "^3.1.1",
         "prettier-plugin-jsdoc": "^1.1.1",
@@ -1283,6 +1283,13 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@types/whatwg-mimetype": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/@types/whatwg-mimetype/-/whatwg-mimetype-3.0.2.tgz",
+      "integrity": "sha512-c2AKvDT8ToxLIOUlN51gTiHXflsfIFisS4pO7pDPoKouJCESkhZnEy623gwP9laCy5lnLDAw1vAzu2vM2YLOrA==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@typescript-eslint/eslint-plugin": {
       "version": "6.21.0",
       "resolved": "https://registry.npmjs.org/@typescript-eslint/eslint-plugin/-/eslint-plugin-6.21.0.tgz",
@@ -3184,18 +3191,18 @@
       "license": "Apache-2.0"
     },
     "node_modules/happy-dom": {
-      "version": "15.11.7",
-      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-15.11.7.tgz",
-      "integrity": "sha512-KyrFvnl+J9US63TEzwoiJOQzZBJY7KgBushJA8X61DMbNsH+2ONkDuLDnCnwUiPTF42tLoEmrPyoqbenVA5zrg==",
+      "version": "20.0.0",
+      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-20.0.0.tgz",
+      "integrity": "sha512-GkWnwIFxVGCf2raNrxImLo397RdGhLapj5cT3R2PT7FwL62Ze1DROhzmYW7+J3p9105DYMVenEejEbnq5wA37w==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "entities": "^4.5.0",
-        "webidl-conversions": "^7.0.0",
+        "@types/node": "^20.0.0",
+        "@types/whatwg-mimetype": "^3.0.2",
         "whatwg-mimetype": "^3.0.0"
       },
       "engines": {
-        "node": ">=18.0.0"
+        "node": ">=20.0.0"
       }
     },
     "node_modules/has-flag": {
@@ -5836,16 +5843,6 @@
         }
       }
     },
-    "node_modules/webidl-conversions": {
-      "version": "7.0.0",
-      "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-7.0.0.tgz",
-      "integrity": "sha512-VwddBukDzu71offAQR975unBIGqfKZpM+8ZX6ySk8nYhVoo5CYaZyzt3YBvYtRtO+aoGlqxPg/B87NGVZ/fu6g==",
-      "dev": true,
-      "license": "BSD-2-Clause",
-      "engines": {
-        "node": ">=12"
-      }
-    },
     "node_modules/whatwg-mimetype": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/whatwg-mimetype/-/whatwg-mimetype-3.0.0.tgz",
diff --git a/package.json b/package.json
index 18e8b2e88..34b228d02 100644
--- a/package.json
+++ b/package.json
@@ -74,7 +74,7 @@
     "eslint-plugin-tsdoc": "^0.2.17",
     "eslint-plugin-vitest": "^0.3.20",
     "grpc-web": "^1.4.2",
-    "happy-dom": "^15.10.1",
+    "happy-dom": "^20.0.0",
     "npm-check-updates": "^17.1.11",
     "prettier": "^3.1.1",
     "prettier-plugin-jsdoc": "^1.1.1",