diff --git a/demo/index.tsx b/demo/index.tsx
index 97c0abcf2f..27a43b0732 100644
--- a/demo/index.tsx
+++ b/demo/index.tsx
@@ -2,7 +2,7 @@ import * as React from 'react';
 import { render } from 'react-dom';
 import styled from 'styled-components';
 import { resolve as urlResolve } from 'url';
-import { RedocStandalone } from '../';
+import { RedocStandalone } from '../src';
 import ComboBox from './ComboBox';
 
 const demos = [
diff --git a/demo/webpack.config.ts b/demo/webpack.config.ts
index 286cc3ed57..8d6b3a9dca 100644
--- a/demo/webpack.config.ts
+++ b/demo/webpack.config.ts
@@ -28,6 +28,10 @@ export default {
   resolve: {
     extensions: ['.ts', '.tsx', '.js', '.json'],
   },
+  
+  node: {
+    fs: 'empty',
+  },
 
   module: {
     rules: [
@@ -56,6 +60,17 @@ export default {
           },
         },
       },
+      {
+        test: /node_modules\/(swagger2openapi|reftools)\/.*\.js$/,
+        use: {
+          loader: 'awesome-typescript-loader',
+          options: {
+            transpileOnly: true,
+            allowJs: true,
+            instance: 'ts2js-transpiler-only',
+          },
+        },
+      },
     ],
   },
   plugins: [
diff --git a/src/components/SelectOnClick/SelectOnClick.tsx b/src/components/SelectOnClick/SelectOnClick.tsx
index d8e3d50394..9856905c2f 100644
--- a/src/components/SelectOnClick/SelectOnClick.tsx
+++ b/src/components/SelectOnClick/SelectOnClick.tsx
@@ -5,7 +5,7 @@ import { ClipboardService } from '../../services';
 export class SelectOnClick extends React.PureComponent {
   private child: HTMLDivElement | null;
   handleClick = () => {
-    ClipboardService.selectElement(this.refs.child);
+    ClipboardService.selectElement(this.child);
   };
 
   render() {
diff --git a/src/services/OpenAPIParser.ts b/src/services/OpenAPIParser.ts
index d4a676df96..1946578ea6 100644
--- a/src/services/OpenAPIParser.ts
+++ b/src/services/OpenAPIParser.ts
@@ -105,7 +105,7 @@ export class OpenAPIParser {
     } catch (e) {
       // do nothing
     }
-    return res;
+    return res || {};
   };
 
   /**