diff --git a/bin/eth.sh b/bin/eth.sh
index 47020bc..32e335d 100755
--- a/bin/eth.sh
+++ b/bin/eth.sh
@@ -1,8 +1,8 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 trap "exit" INT
 
-if [[ -f `which ec2metadata 2>/dev/null` ]]
+if [[ -f $(which ec2metadata 2>/dev/null) ]]
 then
 	# If ec2 instance then get ips from ec2metadata
 	LOCALIP=$(ec2metadata --local-ipv4)
@@ -13,10 +13,10 @@ else
 	IP=$(dig +short myip.opendns.com @resolver1.opendns.com)
 fi
 
-if [[ -f `which geth 2>/dev/null` ]]
+if [[ -f $(which geth 2>/dev/null) ]]
 then
 	geth -rpc -maxpeers "50" -verbosity "3" -bootnodes "enode://09fbeec0d047e9a37e63f60f8618aa9df0e49271f3fadb2c070dc09e2099b95827b63a8b837c6fd01d0802d457dd83e3bd48bd3e6509f8209ed90dabbc30e3d3@52.16.188.185:30303" -nat "extip:$IP"
-elif [[ -f `which eth 2>/dev/null` ]]
+elif [[ -f $(which eth 2>/dev/null) ]]
 then
 	eth --bootstrap --peers 50 --remote 52.16.188.185:30303 --mining off --json-rpc --listen-ip $LOCALIP -v 5
 else