diff --git a/services/web/frontend/js/features/source-editor/languages/index.ts b/services/web/frontend/js/features/source-editor/languages/index.ts
index b3e024a597..04128c8519 100644
--- a/services/web/frontend/js/features/source-editor/languages/index.ts
+++ b/services/web/frontend/js/features/source-editor/languages/index.ts
@@ -55,7 +55,7 @@ export const languages = [
   }),
   LanguageDescription.of({
     name: 'markdown',
-    extensions: ['md', 'markdown'],
+    extensions: ['md', 'markdown', 'qmd', 'rmd'],
     load: () => {
       return import('./markdown').then(m => m.markdown())
     },