diff --git a/packages/swagger/src/swaggerExplorer.ts b/packages/swagger/src/swaggerExplorer.ts
index 41e37bb1b29..1a1f1cc3649 100644
--- a/packages/swagger/src/swaggerExplorer.ts
+++ b/packages/swagger/src/swaggerExplorer.ts
@@ -679,7 +679,7 @@ export class SwaggerExplorer {
             }
           } else {
             tt.content = {
-              'text/plan': {
+              'text/plain': {
                 schema: {
                   type: convertSchemaType(tt.type),
                 },