diff --git a/.travis.yml b/.travis.yml
index 796d98f..c27ec75 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,3 +1,14 @@
 language: node_js
 node_js:
   - "0.12"
+  - "0.11"
+env:
+  global:
+    - secure: Qdkmi13nqcXskABBhbuGZmRakh4orOW1dalkSCyUbzGuYf0OdYF8ttNVuJa0WSWI4KhNXhtz2p3I8dM95wL++LCVqXFmIvZtX8Nca36KlNxIPNXPjn0odayh+c4pgrhrbz8TDmDXl9IPuZmNz8HHtN7xmIn6YDcm13wA3gTmfwo=
+    - RPC_HOST=localhost
+    - RPC_PORT=8080
+    - LISTENING_PORT=30303
+    - INSTANCE_NAME="Travis Node"
+    - CONTACT_DETAILS="marian@ethdev.com"
+    - WS_SERVER="wss://eth-netstats.herokuapp.com"
+    - NODE_ENV="production"
diff --git a/lib/node.js b/lib/node.js
index c9ea939..e35a65d 100644
--- a/lib/node.js
+++ b/lib/node.js
@@ -435,21 +435,21 @@ Node.prototype.getStats = function()
 	this.uptime();
 }
 
-Node.prototype.getHistory = function(interval)
+Node.prototype.getHistory = function(range)
 {
 	var history = [];
-	console.log('interval', interval);
-	if(typeof interval === 'undefined' || interval === null)
+	console.log('range', range);
+	if(typeof range === 'undefined' || range === null)
 	{
-		interval = {
+		range = {
 			min: this.stats.block.number - MAX_HISTORY_UPDATE,
 			max: this.stats.block.number - 1
 		}
 	}
 
-	for(var number = interval.min; number <= interval.max; number++)
+	for(var i = range.min; i <= range.max; i++)
 	{
-		var block = this.getBlock(number);
+		var block = this.getBlock(i);
 
 		if(block !== null && block.number !== this.blocks[0].number)
 		{