diff --git a/lib/contracts/blockchain.js b/lib/contracts/blockchain.js
index 79a000bc..352fd775 100644
--- a/lib/contracts/blockchain.js
+++ b/lib/contracts/blockchain.js
@@ -86,6 +86,10 @@ class Blockchain {
     this.web3.eth.getCode(address, cb);
   }
 
+  getBlock(blockNumber, cb) {
+    this.web3.eth.getBlock(blockNumber, cb);
+  }
+
 }
 
 module.exports = Blockchain;
diff --git a/lib/contracts/deploy.js b/lib/contracts/deploy.js
index 2ddc8d4c..3d957a4a 100644
--- a/lib/contracts/deploy.js
+++ b/lib/contracts/deploy.js
@@ -26,7 +26,7 @@ class Deploy {
 
   initTracker(cb) {
     this.deployTracker = new DeployTracker({
-      logger: this.logger, chainConfig: this.chainConfig, web3: this.web3, env: this.env
+      logger: this.logger, chainConfig: this.chainConfig, blockchain: this.blockchain, env: this.env
     }, cb);
   }
 
diff --git a/lib/contracts/deploy_tracker.js b/lib/contracts/deploy_tracker.js
index 2873c56a..64d33b3a 100644
--- a/lib/contracts/deploy_tracker.js
+++ b/lib/contracts/deploy_tracker.js
@@ -7,14 +7,14 @@ class DeployTracker {
     this.logger = options.logger;
     this.env = options.env;
     this.chainConfig = options.chainConfig;
-    this.web3 = options.web3;
+    this.blockchain = options.blockchain;
 
     if (this.chainConfig === false) {
       this.currentChain = {contracts: []};
       return cb();
     }
 
-    this.web3.eth.getBlock(0, function(err, block) {
+    this.blockchain.getBlock(0, function(err, block) {
       let chainId = block.hash;
 
       if (self.chainConfig[chainId] === undefined) {