# Migration from Redoc CE 2.x to 3.x

The following table contains the changes in configuration options between Redoc CE 2.x and the newest Redoc CE 3.x configuration.

| Feature/Option | Old Interface (`Options`) | New Interface (`Options`) |
|  --- | --- | --- |
| `theme` | `ResolvedThemeInterface` | Removed |
| `hideHostname` | `boolean` | Removed |
| `expandResponses` | `{ [code: string]: boolean } |'all'` | Removed |
| `requiredPropsFirst` | `boolean` | `sortRequiredPropsFirst: boolean` |
| `sortPropsAlphabetically` | `boolean` | Removed |
| `sortEnumValuesAlphabetically` | `boolean` | Removed |
| `sortOperationsAlphabetically` | `boolean` | Removed |
| `sortTagsAlphabetically` | `boolean` | Removed |
| `nativeScrollbars` | `boolean` | Removed |
| `pathInMiddlePanel` | `boolean` | Removed |
| `downloadDefinitionUrl` | `string` | `downloadUrls?: DownloadUrlsConfig` |
| `disableSearch` | `boolean` | Removed |
| `generatedPayloadSamplesMaxDepth` | `number` | `generatedSamplesMaxDepth: number` |
| `showExtensions` | `boolean | string[]` | `string | string[] | boolean` |
| `hideSingleRequestSampleTab` | `boolean` | Removed |
| `hideRequestPayloadSample` | `boolean` | Removed |
| `menuToggle` | `boolean` | Removed |
| `jsonSampleExpandLevel` | `number` | `jsonSamplesExpandLevel: number` |
| `enumSkipQuotes` | `boolean` | Removed |
| `hideSecuritySection` | `boolean` | Removed |
| `showSecuritySchemeType` | `boolean` | Removed |
| `simpleOneOfTypeLabel` | `boolean` | Removed |
| `payloadSampleIdx` | `number` | Removed |
| `expandSingleSchemaField` | `boolean` | Removed |
| `schemaExpansionLevel` | `number` | `schemasExpansionLevel: number | undefined` |
| `allowedMdComponents` | `Record<string, MDXComponentMeta>` | Removed |
| `expandDefaultServerVariables` | `boolean` | Removed |
| `unstable_ignoreMimeParameters` | `boolean` | Removed |
| `hideSchemaPattern` | `boolean` | Removed |
| `minCharacterLengthToInitSearch` | `number` | Removed |
| `showWebhookVerb` | `boolean` | Removed |
| `showObjectSchemaExamples` | `boolean` | Removed |


## Resources

- **[Configure Redoc CE](/docs/redoc/config)** - See configuration options for Redoc 3.x