diff --git a/README.md b/README.md
index a12765e..6e9e85c 100644
--- a/README.md
+++ b/README.md
@@ -69,6 +69,7 @@ $ npm install node-zookeeper-client
 ```javascript
 var zookeeper = require('node-zookeeper-client');
 
+// ipv6 : zookeeper.createClient('[2001:db8:65:6c61:622e:6b72:010:3214]:4322')
 var client = zookeeper.createClient('localhost:2181');
 var path = process.argv[2];
 
diff --git a/lib/ConnectionStringParser.js b/lib/ConnectionStringParser.js
index 4e068df..1c95afc 100644
--- a/lib/ConnectionStringParser.js
+++ b/lib/ConnectionStringParser.js
@@ -59,6 +59,17 @@ function ConnectionStringParser(connectionString) {
         return item;
     }).forEach(function (item) {
         var parts = item.split(':');
+        var ipEndIndex = item.lastIndexOf(']');
+
+        if (parts.length > 2 && ipEndIndex !== -1) { // IPv6 (RFC 3986)
+            // not use endsWith (ECMAScript 6)
+            parts = [item.substring(1, ipEndIndex)];
+
+            // use port number
+            if (ipEndIndex !== (item.length - 1)) {
+                parts.push(item.substring(item.lastIndexOf(':') + 1));
+            }
+        }
 
         servers.push({
             host : parts[0],