diff --git a/demo/playground/hmr-playground.tsx b/demo/playground/hmr-playground.tsx
index d9726c9f..1fedff07 100644
--- a/demo/playground/hmr-playground.tsx
+++ b/demo/playground/hmr-playground.tsx
@@ -6,6 +6,7 @@ import { AppContainer } from 'react-hot-loader';
 import { Redoc, RedocProps } from '../../src/components/Redoc/Redoc';
 import { AppStore } from '../../src/services/AppStore';
 import { loadAndBundleSpec } from '../../src/utils/loadAndBundleSpec';
+import { RedocRawOptions } from '../../src/services/RedocNormalizedOptions';
 
 const renderRoot = (Component: typeof Redoc, props: RedocProps) =>
   render(
@@ -23,12 +24,12 @@ const swagger = window.location.search.indexOf('swagger') > -1; //compatibility
 const specUrl = swagger ? 'swagger.yaml' : big ? 'big-openapi.json' : 'openapi.yaml';
 
 let store;
-const options = {};
+const options: RedocRawOptions = { expandResponses: 'all' };
 
 async function init() {
   const spec = await loadAndBundleSpec(specUrl);
-  store = new AppStore(spec, specUrl);
-  renderRoot(Redoc, { store: store, options });
+  store = new AppStore(spec, specUrl, options);
+  renderRoot(Redoc, { store: store });
 }
 
 init();
@@ -43,7 +44,7 @@ if (module.hot) {
       store = AppStore.fromJS(state);
     }
 
-    renderRoot(Redoc, { store: store, options });
+    renderRoot(Redoc, { store: store });
   };
 
   module.hot.accept(['../../src/components/Redoc/Redoc'], reload());
diff --git a/src/components/OptionsProvider.ts b/src/components/OptionsProvider.ts
index 9d332b77..c86ce252 100644
--- a/src/components/OptionsProvider.ts
+++ b/src/components/OptionsProvider.ts
@@ -1,10 +1,10 @@
 import * as React from 'react';
 import * as PropTypes from 'prop-types';
 
-import { RedocNormalizedOptions, RedocRawOptions } from '../services/RedocNormalizedOptions';
+import { RedocNormalizedOptions } from '../services/RedocNormalizedOptions';
 
 export interface OptionsProviderProps {
-  options: RedocRawOptions;
+  options: RedocNormalizedOptions;
 }
 
 export class OptionsProvider extends React.Component<OptionsProviderProps> {
@@ -14,7 +14,7 @@ export class OptionsProvider extends React.Component<OptionsProviderProps> {
 
   getChildContext() {
     return {
-      redocOptions: new RedocNormalizedOptions(this.props.options),
+      redocOptions: this.props.options,
     };
   }
 
diff --git a/src/components/Redoc/Redoc.tsx b/src/components/Redoc/Redoc.tsx
index 1d767d84..3473cc3f 100644
--- a/src/components/Redoc/Redoc.tsx
+++ b/src/components/Redoc/Redoc.tsx
@@ -11,19 +11,14 @@ import { ContentItems } from '../ContentItems/ContentItems';
 import { AppStore } from '../../services';
 import { OptionsProvider } from '../OptionsProvider';
 import { StickySidebar } from '../StickySidebar/StickySidebar';
-import { RedocRawOptions } from '../../services/RedocNormalizedOptions';
-
-import defaultTheme from '../../theme';
 
 export interface RedocProps {
   store: AppStore;
-  options?: RedocRawOptions;
 }
 
 export class Redoc extends React.Component<RedocProps> {
   static propTypes = {
     store: PropTypes.instanceOf(AppStore).isRequired,
-    options: PropTypes.object,
   };
 
   componentDidMount() {
@@ -31,9 +26,9 @@ export class Redoc extends React.Component<RedocProps> {
   }
 
   render() {
-    const { store: { spec, menu }, options = {} } = this.props;
+    const { store: { spec, menu, options } } = this.props;
     return (
-      <ThemeProvider theme={{ ...options.theme, ...defaultTheme }}>
+      <ThemeProvider theme={options.theme}>
         <OptionsProvider options={options}>
           <RedocWrap className="redoc-wrap">
             <StickySidebar className="menu-content">
diff --git a/src/components/RedocStandalone.tsx b/src/components/RedocStandalone.tsx
index fb241e39..2c805e7f 100644
--- a/src/components/RedocStandalone.tsx
+++ b/src/components/RedocStandalone.tsx
@@ -1,18 +1,15 @@
 import * as React from 'react';
 
-import { ThemeInterface } from '../theme';
-
 import { LoadingWrap } from './LoadingWrap/LoadingWrap';
 import { StoreProvider } from './StoreProvider';
 import { ErrorBoundary } from './ErrorBoundary';
 import { Redoc } from './Redoc/Redoc';
+import { RedocRawOptions } from '../services/RedocNormalizedOptions';
 
 export interface RedocStandaloneProps {
   spec?: object;
   specUrl?: string;
-  options?: {
-    theme?: ThemeInterface;
-  };
+  options?: RedocRawOptions;
 }
 
 export class RedocStandalone extends React.Component<RedocStandaloneProps> {
@@ -41,10 +38,10 @@ export class RedocStandalone extends React.Component<RedocStandaloneProps> {
 
     return (
       <ErrorBoundary>
-        <StoreProvider spec={spec} specUrl={specUrl}>
+        <StoreProvider spec={spec} specUrl={specUrl} options={options}>
           {({ loading, store }) => (
             <LoadingWrap loading={loading}>
-              <Redoc store={store} options={options} />
+              <Redoc store={store} />
             </LoadingWrap>
           )}
         </StoreProvider>
diff --git a/src/components/Responses/Response.tsx b/src/components/Responses/Response.tsx
index ccfbb419..81c99bc9 100644
--- a/src/components/Responses/Response.tsx
+++ b/src/components/Responses/Response.tsx
@@ -34,23 +34,24 @@ export class ResponseView extends React.Component<{ response: ResponseModel }> {
           code={code}
           opened={expanded}
         />
-        {expanded && (
-          <ResponseDetailsWrap>
-            <ResponseHeaders headers={headers} />
-            <MediaTypesSwitch
-              content={content!}
-              renderDropdown={props => (
-                <UnderlinedHeader key="header">
-                  Response Schema: <DropdownOrLabel {...props} />
-                </UnderlinedHeader>
-              )}
-            >
-              {({ schema }) => {
-                return <Schema skipWriteOnly={true} key="schema" schema={schema} />;
-              }}
-            </MediaTypesSwitch>
-          </ResponseDetailsWrap>
-        )}
+        {expanded &&
+          !empty && (
+            <ResponseDetailsWrap>
+              <ResponseHeaders headers={headers} />
+              <MediaTypesSwitch
+                content={content!}
+                renderDropdown={props => (
+                  <UnderlinedHeader key="header">
+                    Response Schema: <DropdownOrLabel {...props} />
+                  </UnderlinedHeader>
+                )}
+              >
+                {({ schema }) => {
+                  return <Schema skipWriteOnly={true} key="schema" schema={schema} />;
+                }}
+              </MediaTypesSwitch>
+            </ResponseDetailsWrap>
+          )}
       </div>
     );
   }
diff --git a/src/components/Responses/ResponsesList.tsx b/src/components/Responses/ResponsesList.tsx
index 70a6a8f9..c12f29c5 100644
--- a/src/components/Responses/ResponsesList.tsx
+++ b/src/components/Responses/ResponsesList.tsx
@@ -11,9 +11,11 @@ const ResponsesHeader = styled.h3`
   font-weight: normal;
 `;
 
-export class ResponsesList extends React.PureComponent<{
+export interface ResponseListProps {
   responses: ResponseModel[];
-}> {
+}
+
+export class ResponsesList extends React.PureComponent<ResponseListProps> {
   render() {
     const { responses } = this.props;
 
diff --git a/src/components/StoreProvider.ts b/src/components/StoreProvider.ts
index 784fda23..103c8192 100644
--- a/src/components/StoreProvider.ts
+++ b/src/components/StoreProvider.ts
@@ -2,12 +2,15 @@ import { Component } from 'react';
 
 import { AppStore } from '../services/';
 import { loadAndBundleSpec } from '../utils';
+import { RedocRawOptions } from '../services/RedocNormalizedOptions';
 
 interface SpecProps {
   specUrl?: string;
   spec?: object;
   store?: AppStore;
 
+  options?: RedocRawOptions;
+
   children?: any;
 }
 
@@ -33,7 +36,7 @@ export class StoreProvider extends Component<SpecProps, SpecState> {
   }
 
   async load() {
-    let { specUrl, spec } = this.props;
+    let { specUrl, spec, options } = this.props;
 
     this.setState({
       loading: true,
@@ -43,7 +46,7 @@ export class StoreProvider extends Component<SpecProps, SpecState> {
       const resolvedSpec = await loadAndBundleSpec(spec || specUrl!);
       this.setState({
         loading: false,
-        store: new AppStore(resolvedSpec, specUrl),
+        store: new AppStore(resolvedSpec, specUrl, options),
       });
     } catch (e) {
       this.setState({
diff --git a/src/services/AppStore.ts b/src/services/AppStore.ts
index bb1d8936..9cc10e0d 100644
--- a/src/services/AppStore.ts
+++ b/src/services/AppStore.ts
@@ -3,6 +3,7 @@ import { SpecStore } from './models';
 import { MenuStore } from './MenuStore';
 import { ScrollService } from './ScrollService';
 import { loadAndBundleSpec } from '../utils/loadAndBundleSpec';
+import { RedocNormalizedOptions, RedocRawOptions } from './RedocNormalizedOptions';
 
 type StoreData = {
   menu: {
@@ -12,22 +13,31 @@ type StoreData = {
     url: string;
     data: any;
   };
+  options: RedocRawOptions;
 };
 
-export async function createStore(spec: object, specUrl: string) {
+export async function createStore(
+  spec: object,
+  specUrl: string | undefined,
+  options: RedocRawOptions = {},
+) {
   const resolvedSpec = await loadAndBundleSpec(spec || specUrl);
-  return new AppStore(resolvedSpec, specUrl);
+  return new AppStore(resolvedSpec, specUrl, options);
 }
 
 export class AppStore {
   menu: MenuStore;
   spec: SpecStore;
+  rawOptions: RedocRawOptions;
+  options: RedocNormalizedOptions;
 
   private scroll: ScrollService;
 
-  constructor(spec: OpenAPISpec, specUrl?: string) {
+  constructor(spec: OpenAPISpec, specUrl?: string, options: RedocRawOptions = {}) {
+    this.rawOptions = options;
+    this.options = new RedocNormalizedOptions(options);
     this.scroll = new ScrollService();
-    this.spec = new SpecStore(spec, specUrl);
+    this.spec = new SpecStore(spec, specUrl, this.options);
     this.menu = new MenuStore(this.spec, this.scroll);
   }
 
@@ -50,6 +60,7 @@ export class AppStore {
         url: this.spec.parser.specUrl,
         data: this.spec.parser.spec,
       },
+      options: this.rawOptions,
     };
   }
   /**
@@ -58,7 +69,7 @@ export class AppStore {
    */
   // TODO:
   static fromJS(state: StoreData): AppStore {
-    const inst = new AppStore(state.spec.data, state.spec.url);
+    const inst = new AppStore(state.spec.data, state.spec.url, state.options);
     inst.menu.activeItemIdx = state.menu.activeItemIdx || 0;
     inst.menu.activate(inst.menu.flatItems[inst.menu.activeItemIdx]);
     return inst;
diff --git a/src/services/MenuBuilder.ts b/src/services/MenuBuilder.ts
index 35892b76..8387de2f 100644
--- a/src/services/MenuBuilder.ts
+++ b/src/services/MenuBuilder.ts
@@ -3,6 +3,7 @@ import { GroupModel, OperationModel } from './models';
 import { JsonPointer, isOperationName } from '../utils';
 import { OpenAPIOperation, OpenAPIParameter, OpenAPISpec, OpenAPITag, Referenced } from '../types';
 import { MarkdownRenderer } from './MarkdownRenderer';
+import { RedocNormalizedOptions } from './RedocNormalizedOptions';
 
 export type TagInfo = OpenAPITag & {
   operations: ExtendedOpenAPIOperation[];
@@ -29,16 +30,21 @@ export class MenuBuilder {
   /**
    * Builds page content structure based on tags
    */
-  static buildStructure(parser: OpenAPIParser): ContentItemModel[] {
+  static buildStructure(
+    parser: OpenAPIParser,
+    options: RedocNormalizedOptions,
+  ): ContentItemModel[] {
     const spec = parser.spec;
 
     const items: ContentItemModel[] = [];
     const tagsMap = MenuBuilder.getTagsWithOperations(spec);
     items.push(...MenuBuilder.addMarkdownItems(spec.info.description || ''));
     if (spec['x-tagGroups']) {
-      items.push(...MenuBuilder.getTagGroupsItems(parser, undefined, spec['x-tagGroups'], tagsMap));
+      items.push(
+        ...MenuBuilder.getTagGroupsItems(parser, undefined, spec['x-tagGroups'], tagsMap, options),
+      );
     } else {
-      items.push(...MenuBuilder.getTagsItems(parser, tagsMap));
+      items.push(...MenuBuilder.getTagsItems(parser, tagsMap, undefined, undefined, options));
     }
     return items;
   }
@@ -62,12 +68,13 @@ export class MenuBuilder {
     parent: GroupModel | undefined,
     groups: TagGroup[],
     tags: TagsInfoMap,
+    options: RedocNormalizedOptions,
   ): GroupModel[] {
     let res: GroupModel[] = [];
     for (let group of groups) {
       let item = new GroupModel('group', group, parent);
       item.depth = GROUP_DEPTH;
-      item.items = MenuBuilder.getTagsItems(parser, tags, item, group);
+      item.items = MenuBuilder.getTagsItems(parser, tags, item, group, options);
       res.push(item);
     }
     // TODO checkAllTagsUsedInGroups
@@ -83,8 +90,9 @@ export class MenuBuilder {
   static getTagsItems(
     parser: OpenAPIParser,
     tagsMap: TagsInfoMap,
-    parent?: GroupModel,
-    group?: TagGroup,
+    parent: GroupModel | undefined,
+    group: TagGroup | undefined,
+    options: RedocNormalizedOptions,
   ): ContentItemModel[] {
     let tagNames;
 
@@ -108,11 +116,11 @@ export class MenuBuilder {
       if (!tag) continue;
       let item = new GroupModel('tag', tag, parent);
       item.depth = GROUP_DEPTH + 1;
-      item.items = this.getOperationsItems(parser, item, tag, item.depth + 1);
+      item.items = this.getOperationsItems(parser, item, tag, item.depth + 1, options);
 
       // don't put empty tag into content, instead put its operations
       if (tag.name === '') {
-        let items = this.getOperationsItems(parser, undefined, tag, item.depth);
+        let items = this.getOperationsItems(parser, undefined, tag, item.depth, options);
         res.push(...items);
         continue;
       }
@@ -133,6 +141,7 @@ export class MenuBuilder {
     parent: GroupModel | undefined,
     tag: TagInfo,
     depth: number,
+    options: RedocNormalizedOptions,
   ): OperationModel[] {
     if (tag.operations.length === 0) {
       return [];
@@ -140,7 +149,7 @@ export class MenuBuilder {
 
     let res: OperationModel[] = [];
     for (let operationInfo of tag.operations) {
-      let operation = new OperationModel(parser, operationInfo, parent);
+      let operation = new OperationModel(parser, operationInfo, parent, options);
       operation.depth = depth;
       res.push(operation);
     }
diff --git a/src/services/RedocNormalizedOptions.ts b/src/services/RedocNormalizedOptions.ts
index ce729df7..9f86fd0e 100644
--- a/src/services/RedocNormalizedOptions.ts
+++ b/src/services/RedocNormalizedOptions.ts
@@ -1,20 +1,43 @@
 import { ThemeInterface } from '../theme';
 import { isNumeric } from '../utils/helpers';
+import defaultTheme from '../theme';
 
 export interface RedocRawOptions {
   theme?: ThemeInterface;
   scrollYOffset?: number | string | Function;
   hideHostname?: boolean | string;
+  expandResponses?: string | 'all';
 }
 
 export class RedocNormalizedOptions {
   theme: ThemeInterface;
   scrollYOffset: () => number;
   hideHostname: boolean;
+  expandResponses: { [code: string]: boolean } | 'all';
 
   constructor(raw: RedocRawOptions) {
+    this.theme = { ...(raw.theme || {}), ...defaultTheme }; // todo: merge deep
     this.scrollYOffset = RedocNormalizedOptions.normalizeScrollYOffset(raw.scrollYOffset);
     this.hideHostname = RedocNormalizedOptions.normalizeHideHostname(raw.hideHostname);
+    this.expandResponses = RedocNormalizedOptions.normalizeExpandResponses(raw.expandResponses);
+  }
+
+  static normalizeExpandResponses(value: RedocRawOptions['expandResponses']) {
+    if (value === 'all') {
+      return 'all';
+    }
+    if (typeof value === 'string') {
+      const res = {};
+      value.split(',').forEach(code => {
+        res[code.trim()] = true;
+      });
+      return res;
+    } else {
+      console.warn(
+        `expandResponses must be a string but received value "${value}" of type ${typeof value}`,
+      );
+      return {};
+    }
   }
 
   static normalizeHideHostname(value: RedocRawOptions['hideHostname']): boolean {
diff --git a/src/services/SpecStore.ts b/src/services/SpecStore.ts
index 2ff040f8..69a8ee22 100644
--- a/src/services/SpecStore.ts
+++ b/src/services/SpecStore.ts
@@ -6,6 +6,7 @@ import { observable, computed } from 'mobx';
 import { MenuBuilder } from './MenuBuilder';
 import { OpenAPIParser } from './OpenAPIParser';
 import { ApiInfoModel } from './models/ApiInfo';
+import { RedocNormalizedOptions } from './RedocNormalizedOptions';
 
 /**
  * Store that containts all the specification related information in the form of tree
@@ -13,7 +14,11 @@ import { ApiInfoModel } from './models/ApiInfo';
 export class SpecStore {
   @observable.ref parser: OpenAPIParser;
 
-  constructor(spec: OpenAPISpec, specUrl?: string) {
+  constructor(
+    spec: OpenAPISpec,
+    specUrl: string | undefined,
+    private options: RedocNormalizedOptions,
+  ) {
     this.parser = new OpenAPIParser(spec, specUrl);
   }
 
@@ -29,7 +34,7 @@ export class SpecStore {
 
   @computed
   get operationGroups() {
-    return MenuBuilder.buildStructure(this.parser);
+    return MenuBuilder.buildStructure(this.parser, this.options);
   }
 
   @computed
diff --git a/src/services/models/Operation.ts b/src/services/models/Operation.ts
index cab0600c..1c806158 100644
--- a/src/services/models/Operation.ts
+++ b/src/services/models/Operation.ts
@@ -14,6 +14,7 @@ import { CodeSample } from './types';
 import { OpenAPIParser } from '../OpenAPIParser';
 import { ContentItemModel, ExtendedOpenAPIOperation } from '../MenuBuilder';
 import { JsonPointer, getOperationSummary, isAbsolutePath, stripTrailingSlash } from '../../utils';
+import { RedocNormalizedOptions } from '../RedocNormalizedOptions';
 
 function isNumeric(n) {
   return !isNaN(parseFloat(n)) && isFinite(n);
@@ -51,7 +52,12 @@ export class OperationModel implements IMenuItem {
   servers: OpenAPIServer[];
   codeSamples: CodeSample[];
 
-  constructor(parser: OpenAPIParser, operationSpec: ExtendedOpenAPIOperation, parent?: GroupModel) {
+  constructor(
+    parser: OpenAPIParser,
+    operationSpec: ExtendedOpenAPIOperation,
+    parent: GroupModel | undefined,
+    options: RedocNormalizedOptions,
+  ) {
     this.id = operationSpec._$ref;
     this.name = getOperationSummary(operationSpec);
     this.description = operationSpec.description;
@@ -81,9 +87,15 @@ export class OperationModel implements IMenuItem {
         }
         return isNumeric(code) || code === 'default';
       }) // filter out other props (e.g. x-props)
-      .map(
-        code => new ResponseModel(parser, code, hasSuccessResponses, operationSpec.responses[code]),
-      );
+      .map(code => {
+        return new ResponseModel(
+          parser,
+          code,
+          hasSuccessResponses,
+          operationSpec.responses[code],
+          options,
+        );
+      });
 
     this.servers = normalizeServers(
       parser.specUrl,
diff --git a/src/services/models/Response.ts b/src/services/models/Response.ts
index 93b15e4f..7691ee23 100644
--- a/src/services/models/Response.ts
+++ b/src/services/models/Response.ts
@@ -6,9 +6,10 @@ import { FieldModel } from './Field';
 import { MediaContentModel } from './MediaContent';
 import { OpenAPIParser } from '../OpenAPIParser';
 import { getStatusCodeType } from '../../utils';
+import { RedocNormalizedOptions } from '../RedocNormalizedOptions';
 
 export class ResponseModel {
-  @observable public expanded: boolean = false;
+  @observable public expanded: boolean;
 
   public content?: MediaContentModel;
   public code: string;
@@ -16,7 +17,15 @@ export class ResponseModel {
   public type: string;
   public headers: FieldModel[] = [];
 
-  constructor(parser: OpenAPIParser, code: string, defaultAsError: boolean, infoOrRef: Referenced<OpenAPIResponse>) {
+  constructor(
+    parser: OpenAPIParser,
+    code: string,
+    defaultAsError: boolean,
+    infoOrRef: Referenced<OpenAPIResponse>,
+    options: RedocNormalizedOptions,
+  ) {
+    this.expanded = options.expandResponses === 'all' || options.expandResponses[code];
+
     const info = parser.deref(infoOrRef);
     parser.exitRef(infoOrRef);
     this.code = code;