diff --git a/.gitignore b/.gitignore
index bdeb873..b743a60 100755
--- a/.gitignore
+++ b/.gitignore
@@ -38,3 +38,4 @@ stats.html
 examples
 src/node.mjs
 lightweight/index.js
+lightweight/index.umd.js
diff --git a/lightweight/index.d.ts b/lightweight/index.d.ts
index 95eab99..ca12769 100644
--- a/lightweight/index.d.ts
+++ b/lightweight/index.d.ts
@@ -173,12 +173,18 @@ export type MqlError = {
 
 export type MqlOptions = MqlClientOptions & MicrolinkApiOptions;
 
+export const MicrolinkError: new (props: object) => MqlError;
+
+export const version: string;
+
 interface mql {
-  (url: string, opts?: MqlOptions & { stream: string }, gotOpts?: object): Promise<Response>;
+  (url: string, opts?: MqlOptions & { stream: string }, gotOpts?: object): Promise<HTTPResponseRaw>;
   (url: string, opts?: MqlOptions, gotOpts?: object): Promise<MqlResponse>;
   arrayBuffer: (url: string, opts?: MqlOptions, gotOpts?: object) => Promise<HTTPResponseRaw>;
   extend: (gotOpts?: object) => mql;
   stream: (input: RequestInfo, init?: RequestInit) => ReadableStream;
+  MicrolinkError: new (props: object) => MqlError;
+  version: string;
 }
 
 declare const mql: mql;
diff --git a/rollup.config.js b/rollup.config.js
index 45719fc..32adce5 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -44,7 +44,7 @@ const builds = [
     plugins: [commonjs(), rewriteFlattie()]
   }),
   build({
-    compress: true,
+    compress: false,
     input: 'src/lightweight.js',
     output: { file: 'lightweight/index.js', format: 'es' },
     plugins: [
@@ -55,7 +55,7 @@ const builds = [
     ]
   }),
   build({
-    compress: true,
+    compress: false,
     input: 'src/lightweight.js',
     output: { name: 'mql', file: 'lightweight/index.umd.js', format: 'umd' },
     plugins: [
diff --git a/src/factory.js b/src/factory.js
index 10f282d..b6341fc 100644
--- a/src/factory.js
+++ b/src/factory.js
@@ -64,8 +64,8 @@ const factory = streamResponseType => ({
       return opts.responseType === streamResponseType
         ? response
         : { ...response.body, response }
-    } catch (err) {
-      const { response = {} } = err
+    } catch (error) {
+      const { response = {} } = error
       const {
         statusCode,
         body: rawBody,
@@ -77,7 +77,7 @@ const factory = streamResponseType => ({
       const body =
         isObject(rawBody) && !isBodyBuffer
           ? rawBody
-          : parseBody(isBodyBuffer ? rawBody.toString() : rawBody, err, uri)
+          : parseBody(isBodyBuffer ? rawBody.toString() : rawBody, error, uri)
 
       throw new MicrolinkError({
         ...body,
diff --git a/src/node.d.ts b/src/node.d.ts
index 3aea123..92276ba 100644
--- a/src/node.d.ts
+++ b/src/node.d.ts
@@ -1,6 +1,6 @@
-import { MqlPayload, MqlOptions } from '../lightweight';
+import { version, MqlPayload, MqlOptions } from '../lightweight';
 
-export { MqlError, MqlPayload } from '../lightweight'
+export { MicrolinkError, MqlError, MqlPayload } from '../lightweight'
 
 import { Response, Options as GotOpts } from 'got/dist/source/core'
 
@@ -18,6 +18,8 @@ interface Mql {
   extend: (gotOpts?: GotOpts) => Mql;
   stream: (url: string, gotOpts?: GotOpts) => NodeJS.ReadableStream;
   buffer: (url: string, opts?: MqlOptions, gotOpts?: GotOpts) => Promise<HTTPResponseRaw>;
+  MicrolinkError: new (props: object) => MqlError;
+  version: string;
 }
 
 declare const mql: Mql;
diff --git a/test/lightweight.test-d.ts b/test/lightweight.test-d.ts
index b23dc29..0493baf 100644
--- a/test/lightweight.test-d.ts
+++ b/test/lightweight.test-d.ts
@@ -1,9 +1,29 @@
-import mql from '../lightweight'
+import mql, { MicrolinkError } from '../lightweight'
 import type { MqlError } from '../lightweight'
 
+/** error  */
+
+;(async () => {
+  const error = new MicrolinkError({
+    status: 'fail',
+    data: { url: 'something goes wrong' },
+    more: 'https://microlink.io/docs/api/api-parameters/url',
+    code: 'EINVALURLCLIENT',
+    message: 'something goes wrong',
+    url: 'https://example.com'
+  })
+
+  console.log(error.status)
+  console.log(error.data)
+  console.log(error.more)
+  console.log(error.code)
+  console.log(error.url)
+  console.log(error.description)
+})()
+
 /** mql */
 
-;async () => {
+;(async () => {
   const result = await mql('https://example.com', {
     endpoint: 'https://pro.microlink.io',
     apiKey: '123',
@@ -13,17 +33,20 @@ import type { MqlError } from '../lightweight'
 
   console.log(result.status)
   console.log(result.data)
-  console.log(result.statusCode)
   console.log(result.headers)
   console.log(result.response)
-}
+  console.log(result.response.statusCode)
+})()
 
 ;(async () => {
   const response = await mql('https://example.com', {
     stream: 'screenshot',
     screenshot: true
   })
+  console.log(response.url)
   console.log(response.body)
+  console.log(response.headers)
+  console.log(response.statusCode)
 })()
 
 /** data */
@@ -106,6 +129,9 @@ mql('https://example.com', {
   video: true
 })
 
+console.log(MicrolinkError)
+console.log(mql.version)
+
 /** response */
 
 const result = await mql('https://example.com', { meta: true })
diff --git a/test/node.test-d.ts b/test/node.test-d.ts
index 1a1a213..2eac798 100644
--- a/test/node.test-d.ts
+++ b/test/node.test-d.ts
@@ -1,12 +1,37 @@
-import mql from '../src/node'
+import mql, { MicrolinkError } from '../src/node'
+
+/** error  */
+
+;(async () => {
+  const error = new MicrolinkError({
+    status: 'fail',
+    data: { url: 'something goes wrong' },
+    more: 'https://microlink.io/docs/api/api-parameters/url',
+    code: 'EINVALURLCLIENT',
+    message: 'something goes wrong',
+    url: 'https://example.com'
+  })
+
+  console.log(error.status)
+  console.log(error.data)
+  console.log(error.more)
+  console.log(error.code)
+  console.log(error.url)
+  console.log(error.description)
+})()
 
 /** mql */
 
 ;(async () => {
-  const result = await mql('https://example.com', { meta: true })
+  const result = await mql('https://example.com', {
+    endpoint: 'https://pro.microlink.io',
+    apiKey: '123',
+    retry: 2,
+    cache: new Map()
+  })
+
   console.log(result.status)
   console.log(result.data)
-  console.log(result.statusCode)
   console.log(result.headers)
   console.log(result.response)
   console.log(result.response.isFromCache)
@@ -14,10 +39,13 @@ import mql from '../src/node'
 
 ;(async () => {
   const response = await mql('https://example.com', {
-    stream: 'string',
+    stream: 'screenshot',
     screenshot: true
   })
+  console.log(response.url)
   console.log(response.body)
+  console.log(response.headers)
+  console.log(response.statusCode)
 })()
 
 /** got options */