diff --git a/node/node.d.ts b/node/node.d.ts
index d02311e2f7..7147ee4795 100644
--- a/node/node.d.ts
+++ b/node/node.d.ts
@@ -1671,14 +1671,13 @@ declare module "stream" {
         readable: boolean;
         constructor(opts?: ReadableOptions);
         _read(size: number): void;
-        read(size?: number): string|Buffer;
+        read(size?: number): any;
         setEncoding(encoding: string): void;
         pause(): void;
         resume(): void;
         pipe<T extends NodeJS.WritableStream>(destination: T, options?: { end?: boolean; }): T;
         unpipe<T extends NodeJS.WritableStream>(destination?: T): void;
-        unshift(chunk: string): void;
-        unshift(chunk: Buffer): void;
+        unshift(chunk: any): void;
         wrap(oldStream: NodeJS.ReadableStream): NodeJS.ReadableStream;
         push(chunk: any, encoding?: string): boolean;
     }
@@ -1691,15 +1690,12 @@ declare module "stream" {
     export class Writable extends events.EventEmitter implements NodeJS.WritableStream {
         writable: boolean;
         constructor(opts?: WritableOptions);
-        _write(data: Buffer, encoding: string, callback: Function): void;
-        _write(data: string, encoding: string, callback: Function): void;
-        write(buffer: Buffer, cb?: Function): boolean;
-        write(str: string, cb?: Function): boolean;
-        write(str: string, encoding?: string, cb?: Function): boolean;
+        _write(chunk: any, encoding: string, callback: Function): void;
+        write(chunk: any, cb?: Function): boolean;
+        write(chunk: any, encoding?: string, cb?: Function): boolean;
         end(): void;
-        end(buffer: Buffer, cb?: Function): void;
-        end(str: string, cb?: Function): void;
-        end(str: string, encoding?: string, cb?: Function): void;
+        end(chunk: any, cb?: Function): void;
+        end(chunk: any, encoding?: string, cb?: Function): void;
     }
 
     export interface DuplexOptions extends ReadableOptions, WritableOptions {
@@ -1710,15 +1706,12 @@ declare module "stream" {
     export class Duplex extends Readable implements NodeJS.ReadWriteStream {
         writable: boolean;
         constructor(opts?: DuplexOptions);
-        _write(data: Buffer, encoding: string, callback: Function): void;
-        _write(data: string, encoding: string, callback: Function): void;
-        write(buffer: Buffer, cb?: Function): boolean;
-        write(str: string, cb?: Function): boolean;
-        write(str: string, encoding?: string, cb?: Function): boolean;
+        _write(chunk: any, encoding: string, callback: Function): void;
+        write(chunk: any, cb?: Function): boolean;
+        write(chunk: any, encoding?: string, cb?: Function): boolean;
         end(): void;
-        end(buffer: Buffer, cb?: Function): void;
-        end(str: string, cb?: Function): void;
-        end(str: string, encoding?: string, cb?: Function): void;
+        end(chunk: any, cb?: Function): void;
+        end(chunk: any, encoding?: string, cb?: Function): void;
     }
 
     export interface TransformOptions extends ReadableOptions, WritableOptions {}
@@ -1736,17 +1729,14 @@ declare module "stream" {
         resume(): void;
         pipe<T extends NodeJS.WritableStream>(destination: T, options?: { end?: boolean; }): T;
         unpipe<T extends NodeJS.WritableStream>(destination?: T): void;
-        unshift(chunk: string): void;
-        unshift(chunk: Buffer): void;
+        unshift(chunk: any): void;
         wrap(oldStream: NodeJS.ReadableStream): NodeJS.ReadableStream;
         push(chunk: any, encoding?: string): boolean;
-        write(buffer: Buffer, cb?: Function): boolean;
-        write(str: string, cb?: Function): boolean;
-        write(str: string, encoding?: string, cb?: Function): boolean;
+        write(chunk: any, cb?: Function): boolean;
+        write(chunk: any, encoding?: string, cb?: Function): boolean;
         end(): void;
-        end(buffer: Buffer, cb?: Function): void;
-        end(str: string, cb?: Function): void;
-        end(str: string, encoding?: string, cb?: Function): void;
+        end(chunk: any, cb?: Function): void;
+        end(chunk: any, encoding?: string, cb?: Function): void;
     }
 
     export class PassThrough extends Transform {}