diff --git a/packages/medusa/src/api/routes/admin/shipping-options/list-shipping-options.ts b/packages/medusa/src/api/routes/admin/shipping-options/list-shipping-options.ts
index bc7c15a046..1632acf626 100644
--- a/packages/medusa/src/api/routes/admin/shipping-options/list-shipping-options.ts
+++ b/packages/medusa/src/api/routes/admin/shipping-options/list-shipping-options.ts
@@ -66,10 +66,10 @@ export class AdminGetShippingOptionsParams {
   @IsOptional()
   @IsBoolean()
   @Transform(({ value }) => optionalBooleanMapper.get(value))
-  is_return?: string
+  is_return?: boolean
 
   @IsOptional()
   @IsBoolean()
   @Transform(({ value }) => optionalBooleanMapper.get(value))
-  admin_only?: string
+  admin_only?: boolean
 }