diff --git a/.env.example b/.env.example
index 4e12783..db8d53d 100644
--- a/.env.example
+++ b/.env.example
@@ -16,6 +16,7 @@ NONCE_WATCHER_INTERVAL=30
 # how long a tx can be in pending pool (in seconds)
 ALLOWABLE_PENDING_TX_TIMEOUT=180
 # in GWEI
-MAX_GAS_PRICE=100
+MAX_GAS_PRICE=200
 # how much to increase the gas price for a stuck tx
 GAS_PRICE_BUMP_PERCENTAGE=20
+
diff --git a/config.js b/config.js
index 3f93125..50e00b4 100644
--- a/config.js
+++ b/config.js
@@ -1,7 +1,7 @@
 require('dotenv').config()
 
 module.exports = {
-  version: 2.5,
+  version: 2.6,
   netId: Number(process.env.NET_ID) || 42,
   redisUrl: process.env.REDIS_URL,
   rpcUrl: process.env.RPC_URL || 'https://kovan.infura.io/',
@@ -148,8 +148,8 @@ module.exports = {
   gasOracleUrls: ['https://ethgasstation.info/json/ethgasAPI.json', 'https://gas-oracle.zoltu.io/'],
   port: process.env.APP_PORT,
   relayerServiceFee: Number(process.env.RELAYER_FEE),
-  maxGasPrice: process.env.MAX_GAS_PRICE,
-  watherInterval: Number(process.env.NONCE_WATCHER_INTERVAL) * 1000,
-  pendingTxTimeout: Number(process.env.ALLOWABLE_PENDING_TX_TIMEOUT) * 1000,
-  gasBumpPercentage: process.env.GAS_PRICE_BUMP_PERCENTAGE
+  maxGasPrice: process.env.MAX_GAS_PRICE || 200,
+  watherInterval: Number(process.env.NONCE_WATCHER_INTERVAL || 30) * 1000,
+  pendingTxTimeout: Number(process.env.ALLOWABLE_PENDING_TX_TIMEOUT || 180) * 1000,
+  gasBumpPercentage: process.env.GAS_PRICE_BUMP_PERCENTAGE || 20
 }
diff --git a/src/index.js b/src/index.js
index 2e67b15..0588094 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,5 +1,14 @@
 const express = require('express')
-const { netId, port, relayerServiceFee, version } = require('../config')
+const {
+  netId,
+  port,
+  relayerServiceFee,
+  version,
+  gasBumpPercentage,
+  pendingTxTimeout,
+  watherInterval,
+  maxGasPrice
+} = require('../config')
 const relayController = require('./relayController')
 const { fetcher, web3 } = require('./instances')
 const { getMixers } = require('./utils')
@@ -31,7 +40,7 @@ app.get('/', function (req, res) {
 app.get('/status', async function (req, res) {
   let nonce = await redisClient.get('nonce')
   const { ethPrices, gasPrices } = fetcher
-  res.json({ 
+  res.json({
     relayerAddress: web3.eth.defaultAccount,
     mixers,
     gasPrices,
@@ -58,4 +67,20 @@ console.log(`mixers: ${JSON.stringify(mixers)}`)
 console.log(`gasPrices: ${JSON.stringify(fetcher.gasPrices)}`)
 console.log(`netId: ${netId}`)
 console.log(`ethPrices: ${JSON.stringify(fetcher.ethPrices)}`)
-console.log(`Service fee: ${relayerServiceFee}%`)
\ No newline at end of file
+
+const { GAS_PRICE_BUMP_PERCENTAGE, ALLOWABLE_PENDING_TX_TIMEOUT, NONCE_WATCHER_INTERVAL, MAX_GAS_PRICE } = process.env
+if(!NONCE_WATCHER_INTERVAL) {
+  console.log(`NONCE_WATCHER_INTERVAL is not set. Using default value ${watherInterval / 1000} sec`)
+}
+
+if(!GAS_PRICE_BUMP_PERCENTAGE) {
+  console.log(`GAS_PRICE_BUMP_PERCENTAGE is not set. Using default value ${gasBumpPercentage}%`)
+}
+
+if(!ALLOWABLE_PENDING_TX_TIMEOUT) {
+  console.log(`ALLOWABLE_PENDING_TX_TIMEOUT is not set. Using default value ${pendingTxTimeout / 1000} sec`)
+}
+
+if(!MAX_GAS_PRICE) {
+  console.log(`ALLOWABLE_PENDING_TX_TIMEOUT is not set. Using default value ${maxGasPrice} Gwei`)
+}