diff --git a/package.json b/package.json
index 899fd257..933999fc 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,8 @@
   "exports": {
     ".": {
       "import": "./dist/gridplus-sdk.es.js",
-      "require": "./dist/gridplus-sdk.umd.js"
+      "require": "./dist/gridplus-sdk.umd.js",
+      "types": "./dist/index.d.ts"
     }
   },
   "files": [
diff --git a/src/util.ts b/src/util.ts
index 456f71d5..df02b8cc 100644
--- a/src/util.ts
+++ b/src/util.ts
@@ -26,7 +26,6 @@ import {
   isValidBlockExplorerResponse,
 } from './shared/validators';
 import { FirmwareConstants } from './types';
-import { LatticeResponseError } from './shared/errors';
 
 const { COINS, PURPOSES } = BIP_CONSTANTS;
 let ec: EC | undefined;
@@ -44,6 +43,7 @@ export const parseLattice1Response = function (r: string): {
   const parsed: {
     errorMessage: string | null;
     data: Buffer | null;
+    responseCode?: number;
   } = {
     errorMessage: null,
     data: null,