diff --git a/package.json b/package.json
index 5c0ba4e..375a745 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "react-native-update-cli",
-  "version": "1.30.0",
+  "version": "1.30.2",
   "description": "Command tools for javaScript updater with `pushy` service for react native apps.",
   "main": "index.js",
   "bin": {
diff --git a/src/api.js b/src/api.js
index 43b4378..d6ea04e 100644
--- a/src/api.js
+++ b/src/api.js
@@ -166,7 +166,9 @@ export async function uploadFile(fn, key) {
         }
         if (resp.statusCode > 299) {
           return reject(
-            Object.assign(new Error(body), { status: resp.statusCode }),
+            Object.assign(new Error(JSON.stringify(body)), {
+              status: resp.statusCode,
+            }),
           );
         }
         resolve({ hash: formData.key });