diff --git a/package-lock.json b/package-lock.json
index 9aaca33a..7a639360 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1222,9 +1222,9 @@
       }
     },
     "@redocly/openapi-core": {
-      "version": "1.0.0-beta.41",
-      "resolved": "https://registry.npmjs.org/@redocly/openapi-core/-/openapi-core-1.0.0-beta.41.tgz",
-      "integrity": "sha512-jNQY1xVG6+S2XcxvlJhrDWbhyc5Yuh8R9ntduab5CtH1+ReSGmkGB+QhwkZ+ZO1E1le3kUR6cWJXM/loc2uW3A==",
+      "version": "1.0.0-beta.42",
+      "resolved": "https://registry.npmjs.org/@redocly/openapi-core/-/openapi-core-1.0.0-beta.42.tgz",
+      "integrity": "sha512-DKy/eJNAoN94TmZSVnkn4f4IDasmFUZqSSRRBX6eU//2MSMazY0u3XaFY7Bis28uCxJhwBVcDpT/qMwiX2PI1Q==",
       "requires": {
         "@redocly/ajv": "^6.12.3",
         "@types/node": "^14.11.8",
@@ -2596,9 +2596,9 @@
       }
     },
     "balanced-match": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.1.tgz",
-      "integrity": "sha512-qyTw2VPYRg31SlVU5WDdvCSyMTJ3YSP4Kz2CidWZFPFawCiHJdCyKyZeXIGMJ5ebMQYXEI56kDR8tcnDkbZstg=="
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
+      "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw=="
     },
     "base": {
       "version": "0.11.2",
diff --git a/package.json b/package.json
index 08c3864f..384a4d11 100644
--- a/package.json
+++ b/package.json
@@ -134,7 +134,7 @@
     "styled-components": "^4.1.1 || ^5.1.1"
   },
   "dependencies": {
-    "@redocly/openapi-core": "^1.0.0-beta.41",
+    "@redocly/openapi-core": "^1.0.0-beta.42",
     "@redocly/react-dropdown-aria": "^2.0.11",
     "@types/node": "^13.11.1",
     "classnames": "^2.2.6",
diff --git a/src/components/SideMenu/styled.elements.ts b/src/components/SideMenu/styled.elements.ts
index 55846434..e95c1d95 100644
--- a/src/components/SideMenu/styled.elements.ts
+++ b/src/components/SideMenu/styled.elements.ts
@@ -1,4 +1,4 @@
-import * as classnames from 'classnames';
+import { default as classnames } from 'classnames';
 import { darken } from 'polished';
 
 import { deprecatedCss, ShelfIcon } from '../../common-elements';
diff --git a/src/utils/loadAndBundleSpec.ts b/src/utils/loadAndBundleSpec.ts
index 46918c3a..71ad72a8 100644
--- a/src/utils/loadAndBundleSpec.ts
+++ b/src/utils/loadAndBundleSpec.ts
@@ -1,11 +1,12 @@
 /* tslint:disable-next-line:no-implicit-dependencies */
 import { convertObj } from 'swagger2openapi';
 import { OpenAPISpec } from '../types';
-import { Source, Document, bundle, loadConfig } from '@redocly/openapi-core';
+import { Source, Document, bundle, Config, RawConfig } from '@redocly/openapi-core';
 
 export async function loadAndBundleSpec(specUrlOrObject: object | string): Promise<OpenAPISpec> {
   const isNode = typeof process !== 'undefined' && process.versions != null && process.versions.node != null;
-  const config = await loadConfig();
+  const rawConfig: RawConfig = {};
+  const config = new Config(rawConfig);
   const bundleOpts = {
     config,
     base: isNode ? process.cwd() : window.location.href