diff --git a/package-lock.json b/package-lock.json
index 403a5a4..29d1138 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@catalystsquad/zest",
-  "version": "0.3.4",
+  "version": "0.3.5",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@catalystsquad/zest",
-      "version": "0.3.4",
+      "version": "0.3.5",
       "license": "Apache-2.0",
       "workspaces": [
         "packages/*"
@@ -25,7 +25,7 @@
       },
       "devDependencies": {
         "@vitejs/plugin-basic-ssl": "^2.0.0",
-        "happy-dom": "^17.4.4",
+        "happy-dom": "^20.0.7",
         "jsdom": "^26.1.0",
         "vite": "^6.4.1",
         "vitest": "^3.1.2"
@@ -866,6 +866,23 @@
       "integrity": "sha512-w28IoSUCJpidD/TGviZwwMJckNESJZXFu7NBZ5YJ4mEUnNraUn9Pm8HSZm/jDF1pDWYKspWE7oVphigUPRakIQ==",
       "dev": true
     },
+    "node_modules/@types/node": {
+      "version": "20.19.23",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-20.19.23.tgz",
+      "integrity": "sha512-yIdlVVVHXpmqRhtyovZAcSy0MiPcYWGkoO4CGe/+jpP0hmNuihm4XhHbADpK++MsiLHP5MVlv+bcgdF99kSiFQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "undici-types": "~6.21.0"
+      }
+    },
+    "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/@vitejs/plugin-basic-ssl": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/@vitejs/plugin-basic-ssl/-/plugin-basic-ssl-2.0.0.tgz",
@@ -1208,16 +1225,18 @@
       }
     },
     "node_modules/happy-dom": {
-      "version": "17.4.4",
-      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-17.4.4.tgz",
-      "integrity": "sha512-/Pb0ctk3HTZ5xEL3BZ0hK1AqDSAUuRQitOmROPHhfUYEWpmTImwfD8vFDGADmMAX0JYgbcgxWoLFKtsWhcpuVA==",
+      "version": "20.0.7",
+      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-20.0.7.tgz",
+      "integrity": "sha512-CywLfzmYxP5OYpuAG0usFY0CpxJtwYR+w8Mms5J8W29Y2Pzf6rbfQS2M523tRZTb0oLA+URopPtnAQX2fupHZQ==",
       "dev": true,
+      "license": "MIT",
       "dependencies": {
-        "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/html-encoding-sniffer": {
@@ -1650,6 +1669,13 @@
         "node": ">=18"
       }
     },
+    "node_modules/undici-types": {
+      "version": "6.21.0",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.21.0.tgz",
+      "integrity": "sha512-iwDZqg0QAGrg9Rav5H4n0M64c3mkR59cJ6wQp+7C4nI0gsmExaedaYLNO44eT4AtBBwjbTiGPMlt2Md0T9H9JQ==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/vite": {
       "version": "6.4.1",
       "resolved": "https://registry.npmjs.org/vite/-/vite-6.4.1.tgz",
diff --git a/package.json b/package.json
index db90e07..9f97f3c 100644
--- a/package.json
+++ b/package.json
@@ -33,7 +33,7 @@
   "homepage": "https://github.com/catalystsquad/zest#README.md",
   "devDependencies": {
     "@vitejs/plugin-basic-ssl": "^2.0.0",
-    "happy-dom": "^17.4.4",
+    "happy-dom": "^20.0.7",
     "jsdom": "^26.1.0",
     "vite": "^6.4.1",
     "vitest": "^3.1.2"