diff --git a/src/constants/languages.ts b/src/constants/languages.ts
new file mode 100644
index 00000000..c8dca0da
--- /dev/null
+++ b/src/constants/languages.ts
@@ -0,0 +1,4 @@
+export const CODE_SAMPLE_LANGUAGES = {
+  JSON: 'json',
+  XML: 'xml',
+} as const;
diff --git a/src/services/RedocNormalizedOptions.ts b/src/services/RedocNormalizedOptions.ts
index 17204f6e..45e10660 100644
--- a/src/services/RedocNormalizedOptions.ts
+++ b/src/services/RedocNormalizedOptions.ts
@@ -5,8 +5,9 @@ import { isArray, isNumeric, mergeObjects } from '../utils/helpers';
 import { setRedocLabels } from './Labels';
 import { SideNavStyleEnum } from './types';
 import type { LabelsConfigRaw, MDXComponentMeta } from './types';
+import { CODE_SAMPLE_LANGUAGES } from '../constants/languages';
 
-export type CodeSamplesLanguage = 'json' | 'xml';
+export type CodeSamplesLanguage = typeof CODE_SAMPLE_LANGUAGES[keyof typeof CODE_SAMPLE_LANGUAGES];
 
 export interface RedocRawOptions {
   theme?: ThemeInterface;