diff --git a/package-lock.json b/package-lock.json
index c8375012..6a0f84ce 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,6 +4,7 @@
   "requires": true,
   "packages": {
     "": {
+      "name": "oas",
       "workspaces": [
         "./packages/*"
       ],
@@ -13897,9 +13898,9 @@
       }
     },
     "node_modules/nanoid": {
-      "version": "3.3.7",
-      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.7.tgz",
-      "integrity": "sha512-eSRppjcPIatRIMC1U6UngP8XFcz8MQWGQdt1MTBQ7NaAmvXDfvNxbvWV3x2y6CdEUciCSsDHDQZbhYaB8QEo2g==",
+      "version": "3.3.8",
+      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.8.tgz",
+      "integrity": "sha512-WNLf5Sd8oZxOm+TzppcYk8gVOgP+l58xNy58D0nbUnOxOWRWvlcCV4kUF7ltmI6PsrLl/BgKEyS4mqsGChFN0w==",
       "dev": true,
       "funding": [
         {
@@ -20621,7 +20622,6 @@
         "jsonpath-plus": "^10.0.0",
         "jsonpointer": "^5.0.0",
         "memoizee": "^0.4.16",
-        "oas-normalize": "file:../oas-normalize",
         "openapi-types": "^12.1.1",
         "path-to-regexp": "^8.1.0",
         "remove-undefined-objects": "^5.0.0"
diff --git a/package.json b/package.json
index 0df6e734..779d7e8f 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,7 @@
   "scripts": {
     "alex": "alex .",
     "attw": "npx lerna run attw --stream",
+    "bench": "vitest bench",
     "build": "npx lerna run build --stream",
     "clean": "npx lerna clean",
     "lint": "npm run lint:types && npm run lint:js && npm run prettier",
diff --git a/packages/oas/package.json b/packages/oas/package.json
index 7f31f499..a8d068b6 100644
--- a/packages/oas/package.json
+++ b/packages/oas/package.json
@@ -94,7 +94,6 @@
     "jsonpath-plus": "^10.0.0",
     "jsonpointer": "^5.0.0",
     "memoizee": "^0.4.16",
-    "oas-normalize": "file:../oas-normalize",
     "openapi-types": "^12.1.1",
     "path-to-regexp": "^8.1.0",
     "remove-undefined-objects": "^5.0.0"
diff --git a/packages/oas/src/reducer/index.ts b/packages/oas/src/reducer/index.ts
index 5cec4cfa..0d80c430 100644
--- a/packages/oas/src/reducer/index.ts
+++ b/packages/oas/src/reducer/index.ts
@@ -1,7 +1,6 @@
 import type { ComponentsObject, HttpMethods, OASDocument, TagObject } from '../types.js';
 
 import jsonPointer from 'jsonpointer';
-import { getAPIDefinitionType } from 'oas-normalize/lib/utils';
 
 import { query } from '../analyzer/util.js';
 
@@ -81,7 +80,7 @@ export default function reducer(definition: OASDocument, opts: ReducerOptions =
   const $refs: Set<string> = new Set();
   const usedTags: Set<string> = new Set();
 
-  if (getAPIDefinitionType(definition) !== 'openapi') {
+  if (!definition.openapi) {
     throw new Error('Sorry, only OpenAPI definitions are supported.');
   }