diff --git a/index.d.ts b/index.d.ts
index 7ba52bd..6b43c5c 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -1,18 +1,39 @@
 /// <reference types="node" />
 
 declare module 'clickhouse' {
-  import {Stream} from 'stream';
+  import { Transform, Stream } from 'stream';
 
   type callbackExec = (error: Error, rows?: Object[]) => void;
 
+  export interface DriverOptions {
+    debug: boolean,
+    database: string,
+    password: string,
+    basicAuth: {
+      username: string
+      password: string
+    },
+    isUseGzip: boolean,
+    config: {
+      session_timeout: number,
+      output_format_json_quote_64bit_integers: number,
+      enable_http_compression: number
+    },
+    format: 'json' | 'tsv' | 'csv', 
+    raw: boolean,
+    isSessionPerQuery: boolean,
+    trimQuery: boolean,
+    usePost: boolean,
+  }
+
   export class ClickHouse {
-    constructor(opts: Object);
+    constructor(opts: DriverOptions);
     query(query: String, reqParams?: object): QueryCursor;
     insert(query: String, data?: object): QueryCursor;
     sessionId: string;
   }
 
-  export class WriteStream extends Stream.Transform {
+  export class WriteStream extends Transform {
     writeRow(data: Array<any> | string): Promise<void>;
     exec(): Promise<{}>;
   }