diff --git a/lib/contracts/code_generator.js b/lib/contracts/code_generator.js
index 584d97d36..b57dced3f 100644
--- a/lib/contracts/code_generator.js
+++ b/lib/contracts/code_generator.js
@@ -1,4 +1,4 @@
-const ejs = require('ejs');
+require('ejs');
 const Templates = {
   utils: require('./code_templates/utils.js.ejs'),
   vanilla_contract: require('./code_templates/vanilla-contract.js.ejs'),
@@ -206,9 +206,6 @@ class CodeGenerator {
       let contract = this.contractsManager.contracts[className];
       let contractJSON = {};
 
-      let abi = JSON.stringify(contract.abiDefinition);
-      let gasEstimates = JSON.stringify(contract.gasEstimates);
-
       contractJSON.contract_name = className;
       contractJSON.address = contract.deployedAddress;
       contractJSON.code = contract.code;
diff --git a/lib/contracts/contracts.js b/lib/contracts/contracts.js
index 2c73c6936..2dcb677af 100644
--- a/lib/contracts/contracts.js
+++ b/lib/contracts/contracts.js
@@ -162,7 +162,7 @@ class ContractsManager {
         }
         callback();
       }
-    ], function (err, result) {
+    ], function (err, _result) {
       if (err) {
         self.logger.error("Error Compiling/Building contracts: " + err);
       }
diff --git a/lib/contracts/deploy.js b/lib/contracts/deploy.js
index 6ee6bacbb..c9ea7ada0 100644
--- a/lib/contracts/deploy.js
+++ b/lib/contracts/deploy.js
@@ -36,12 +36,7 @@ class Deploy {
 
   checkAndDeployContract(contract, params, callback) {
     let self = this;
-    let suppliedArgs;
     let realArgs;
-    let arg;
-    let l;
-    let contractName;
-    let referedContract;
     contract.error = false;
 
     if (contract.deploy === false) {
@@ -164,7 +159,7 @@ class Deploy {
         self.logger.trace(arguments);
         self.checkAndDeployContract(contract, null, callback);
       },
-      function (err, results) {
+      function (err, _results) {
         if (err) {
           self.logger.error("error deploying contracts");
           self.logger.error(err.message);
diff --git a/lib/contracts/deploy_manager.js b/lib/contracts/deploy_manager.js
index 3b3ec750e..975abae0c 100644
--- a/lib/contracts/deploy_manager.js
+++ b/lib/contracts/deploy_manager.js
@@ -42,7 +42,7 @@ class DeployManager {
           return callback(Error("error connecting to blockchain node"));
         }
         if (self.web3.currentProvider.isConnected === undefined) {
-          self.web3.version.getNode(function (err, version) {
+          self.web3.version.getNode(function (err, _version) {
             if (err) {
               return callback(Error("error connecting to blockchain node"));
             }