diff --git a/npm/ng-packs/packages/core/src/lib/models/rest.ts b/npm/ng-packs/packages/core/src/lib/models/rest.ts
index 2f0e175002..03d70161bc 100644
--- a/npm/ng-packs/packages/core/src/lib/models/rest.ts
+++ b/npm/ng-packs/packages/core/src/lib/models/rest.ts
@@ -34,7 +34,7 @@ export namespace Rest {
           [param: string]: any;
         };
     reportProgress?: boolean;
-    responseType?: ResponseType;
+    responseType?: 'arraybuffer' | 'blob' | 'json' | 'text';
     url: string;
     withCredentials?: boolean;
   }