diff --git a/types/ethereumjs-util/index.d.ts b/types/ethereumjs-util/index.d.ts
index eb47d3a6a9..c5ae356f5b 100644
--- a/types/ethereumjs-util/index.d.ts
+++ b/types/ethereumjs-util/index.d.ts
@@ -1,15 +1,15 @@
-// Type definitions for ethereumjs-util 5.1
+// Type definitions for ethereumjs-util 5.2
 // Project: https://github.com/ethereumjs/ethereumjs-util#readme
 // Definitions by: Juan J. Jimenez-Anca <https://github.com/cortopy>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
 /// <reference types="node" />
 
-// TODO: import types for [`BN`](https://github.com/indutny/bn.js)
-// TODO: MAX_INTEGER as type of BN
 // TODO: import types for [`rlp`](https://github.com/ethereumjs/rlp)
 // TODO: import types for [`secp256k1`](https://github.com/cryptocoinjs/secp256k1-node/)
 
+import BN = require("bn.js");
+
 export const SHA3_NULL_S: string;
 
 export const SHA3_RLP_ARRAY_S: string;
@@ -18,13 +18,11 @@ export const SHA3_RLP_S: string;
 
 export function addHexPrefix(str: string): string;
 
-export function arrayContainsArray(superset: any, subset: any, some: any): any;
-
-export function baToJSON(ba: Buffer | Uint8Array | string[]): Buffer | Uint8Array | string[];
+export function baToJSON(ba: Buffer | Uint8Array | string[]): Buffer | Uint8Array | string[] | null;
 
 export function bufferToHex(buf: Buffer | Uint8Array): string;
 
-export function bufferToInt(buf: Buffer | Uint8Array): string;
+export function bufferToInt(buf: Buffer | Uint8Array): number;
 
 export function defineProperties(self: {[k: string]: any}, fields: string[], data: {[k: string]: any}): {[k: string]: any};
 
@@ -34,14 +32,16 @@ export function ecsign(msgHash: Buffer | Uint8Array, privateKey: Buffer | Uint8A
 
 export function fromRpcSig(sig: string): {[k: string]: any};
 
-export function fromSigned(num: Buffer | Uint8Array): any;
+export function fromSigned(num: Buffer | Uint8Array): BN;
 
 export function generateAddress(from: Buffer | Uint8Array, nonce: Buffer | Uint8Array): Buffer | Uint8Array;
 
-export function hashPersonalMessage(message: string): Buffer | Uint8Array;
+export function hashPersonalMessage(message: Buffer | Uint8Array | any[]): Buffer | Uint8Array;
 
 export function importPublic(publicKey: Buffer | Uint8Array): Buffer | Uint8Array;
 
+export function isPrecompiled(address: Buffer | Uint8Array): boolean;
+
 export function isValidAddress(address: string): boolean;
 
 export function isValidChecksumAddress(address: Buffer | Uint8Array): boolean;
@@ -52,11 +52,17 @@ export function isValidPublic(publicKey: Buffer | Uint8Array, sanitize?: boolean
 
 export function isValidSignature(v: Buffer | Uint8Array, r: Buffer | Uint8Array, s: Buffer | Uint8Array, homestead?: boolean): boolean;
 
+export function isZeroAddress(address: string): boolean;
+
+export function keccak(a: Buffer | Uint8Array | any[] | string | number, bits?: number): Buffer | Uint8Array;
+
+export function keccak256(a: Buffer | Uint8Array | any[] | string | number): Buffer | Uint8Array;
+
 export function privateToAddress(privateKey: Buffer | Uint8Array): Buffer | Uint8Array;
 
 export function privateToPublic(privateKey: Buffer | Uint8Array): Buffer | Uint8Array;
 
-export function pubToAddress(pubKey: Buffer | Uint8Array, sanitize: boolean): Buffer | Uint8Array;
+export function pubToAddress(pubKey: Buffer | Uint8Array, sanitize?: boolean): Buffer | Uint8Array;
 
 export function ripemd160(a: Buffer | Uint8Array | any[] | string | number, padded: boolean): Buffer | Uint8Array;
 
@@ -76,8 +82,10 @@ export function toChecksumAddress(address: string): string;
 
 export function toRpcSig(v: number, r: Buffer | Uint8Array, s: Buffer | Uint8Array): string;
 
-export function toUnsigned(num: any): Buffer | Uint8Array;
+export function toUnsigned(num: BN): Buffer | Uint8Array;
 
 export function unpad<T extends Buffer | Uint8Array | any[] | string>(a: T): T;
 
 export function zeros(bytes: number): Buffer | Uint8Array;
+
+export function zeroAddress(): string;