diff --git a/lib/deploy.js b/lib/deploy.js
index c903222a..11ee3a9e 100644
--- a/lib/deploy.js
+++ b/lib/deploy.js
@@ -3,6 +3,7 @@ var fs = require('fs');
 var grunt = require('grunt');
 var readYaml = require('read-yaml');
 var Config = require('./config/config.js');
+var BigNumber = require('bignumber.js');
 
 Deploy = function(env, contractFiles, blockchainConfig, contractsConfig, chainManager, withProvider, withChain, _web3) {
   if (_web3 !== undefined) {
diff --git a/package.json b/package.json
index 5817c1b6..9da36b7c 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,8 @@
     "shelljs": "^0.5.0",
     "solc": "^0.1.6",
     "toposort": "^0.2.10",
-    "web3": "^0.15.0",
+    "web3": "^0.8.1",
+    "bignumber.js": "debris/bignumber.js#master",
     "wrench": "^1.5.8",
     "ethersim": "^0.1.1"
   },