diff --git a/src/index.ts b/src/index.ts
index 39f02dc73..05528a77f 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -168,8 +168,10 @@ export * from './util/errors/BadRequestHttpError';
 export * from './util/errors/ConflictHttpError';
 export * from './util/errors/ForbiddenHttpError';
 export * from './util/errors/HttpError';
+export * from './util/errors/InternalServerError';
 export * from './util/errors/MethodNotAllowedHttpError';
 export * from './util/errors/NotFoundHttpError';
+export * from './util/errors/NotImplementedHttpError';
 export * from './util/errors/SystemError';
 export * from './util/errors/UnauthorizedHttpError';
 export * from './util/errors/UnsupportedMediaTypeHttpError';