diff --git a/libs/remix-debug/src/code/disassembler.ts b/libs/remix-debug/src/code/disassembler.ts
index f9524bb482..3c963b8202 100644
--- a/libs/remix-debug/src/code/disassembler.ts
+++ b/libs/remix-debug/src/code/disassembler.ts
@@ -2,6 +2,7 @@
 
 import { parseCode } from './codeUtils'
 import { util } from '@remix-project/remix-lib'
+import { bufferToHex } from 'ethereumjs-util'
 
 function createExpressions (instructions) {
   const expressions = []
@@ -36,7 +37,7 @@ function createExpressions (instructions) {
 
 function toString (expr) {
   if (expr.name.slice(0, 4) === 'PUSH') {
-    return util.hexConvert(expr.pushData)
+    return bufferToHex(expr.pushData)
   } else if (expr.name === 'JUMPDEST') {
     return expr.label + ':'
   } else if (expr.args) {
diff --git a/libs/remix-lib/src/util.ts b/libs/remix-lib/src/util.ts
index d17129d958..616134dbcd 100644
--- a/libs/remix-lib/src/util.ts
+++ b/libs/remix-lib/src/util.ts
@@ -13,20 +13,8 @@ import { BN, bufferToHex, keccak, setLengthLeft, toBuffer } from 'ethereumjs-uti
 /*
     ints: IntArray
   */
-export function hexConvert (ints) {
-  let ret = '0x'
-  for (let i = 0; i < ints.length; i++) {
-    const h = ints[i]
-    if (h) {
-      ret += (h <= 0xf ? '0' : '') + h.toString(16)
-    } else {
-      ret += '00'
-    }
-  }
-  return ret
-}
 
-/**
+ /**
    * Converts a hex string to an array of integers.
    */
 export function hexToIntArray (hexString) {
@@ -56,22 +44,11 @@ export function hexListFromBNs (bnList) {
   return ret
 }
 
-/*
-  ints: list of IntArrays
-*/
-export function hexListConvert (intsList) {
-  const ret = []
-  for (const k in intsList) {
-    ret.push(this.hexConvert(intsList[k]))
-  }
-  return ret
-}
-
 /*
   ints: ints: IntArray
 */
 export function formatMemory (mem) {
-  const hexMem = this.hexConvert(mem).substr(2)
+  const hexMem = bufferToHex(mem).substr(2)
   const ret = []
   for (let k = 0; k < hexMem.length; k += 32) {
     const row = hexMem.substr(k, 32)
diff --git a/libs/remix-lib/src/web3Provider/web3VmProvider.ts b/libs/remix-lib/src/web3Provider/web3VmProvider.ts
index c883899000..367370f928 100644
--- a/libs/remix-lib/src/web3Provider/web3VmProvider.ts
+++ b/libs/remix-lib/src/web3Provider/web3VmProvider.ts
@@ -1,6 +1,6 @@
-import { hexConvert, hexListFromBNs, formatMemory } from '../util'
+import { hexListFromBNs, formatMemory } from '../util'
 import { normalizeHexAddress } from '../helpers/uiHelper'
-import { toChecksumAddress, BN, toBuffer, Address } from 'ethereumjs-util'
+import { toChecksumAddress, BN, bufferToHex, Address } from 'ethereumjs-util'
 import Web3 from 'web3'
 
 export class Web3VmProvider {
@@ -96,7 +96,7 @@ export class Web3VmProvider {
 
   async txWillProcess (data) {
     this.incr++
-    this.processingHash = hexConvert(data.hash())
+    this.processingHash = bufferToHex(data.hash())
     this.vmTraces[this.processingHash] = {
       gas: '0x0',
       return: '0x0',
@@ -109,7 +109,7 @@ export class Web3VmProvider {
       tx['to'] = toChecksumAddress(data.to.toString())
     }
     this.processingAddress = tx['to']
-    tx['input'] = hexConvert(data.data)
+    tx['input'] = bufferToHex(data.data)
     tx['gas'] = data.gasLimit.toString(10)
     if (data.value) {
       tx['value'] = data.value.toString(10)
@@ -164,7 +164,7 @@ export class Web3VmProvider {
       this.vmTraces[this.processingHash].return = toChecksumAddress(address)
       this.txsReceipt[this.processingHash].contractAddress = toChecksumAddress(address)
     } else if (data.execResult.returnValue) {
-      this.vmTraces[this.processingHash].return = hexConvert(data.execResult.returnValue)
+      this.vmTraces[this.processingHash].return = bufferToHex(data.execResult.returnValue)
     } else {
       this.vmTraces[this.processingHash].return = '0x'
     }
@@ -235,7 +235,7 @@ export class Web3VmProvider {
   getCode (address, cb) {
     address = toChecksumAddress(address)
     this.vm.stateManager.getContractCode(Address.fromString(address)).then((result) => {
-      cb(null, hexConvert(result))
+      cb(null, bufferToHex(result))
     }).catch((error) => {
       cb(error)
     })