diff --git a/src/packery.js b/src/packery.js
index 8491410..72aae40 100644
--- a/src/packery.js
+++ b/src/packery.js
@@ -64,6 +64,32 @@
     };
   };
 
+  var uuidv4 = function() {
+    var uuid = '';
+    var index;
+
+    for (index = 0; index < 32; index += 1) {
+      switch (index) {
+        case 8:
+        case 20:
+          uuid += '-';
+          uuid += ((Math.random() * 16) | 0).toString(16); // eslint-disable-line no-bitwise
+          break;
+        case 12:
+          uuid += '-';
+          uuid += '4';
+          break;
+        case 16:
+          uuid += '-';
+          uuid += ((Math.random() * 4) | 8).toString(16); // eslint-disable-line no-bitwise
+          break;
+        default:
+          uuid += ((Math.random() * 16) | 0).toString(16); // eslint-disable-line no-bitwise
+      }
+    }
+    return uuid;
+  };
+
   var packeryController = function ($rootScope, config, service) {
 
     var self = this;
@@ -71,7 +97,7 @@
     self.packeryInstantiated = false;
     self.packeryDraggable = false;
     self.dragHandle = undefined;
-    self.uniqueId = new Date().getTime();
+    self.uniqueId = uuidv4();
     self.packery = {};
 
     this.bindDragEvents = function (el) {
@@ -305,4 +331,4 @@
   angular
       .module('packeryTemplates', []).run(['$templateCache', packeryTemplates]);
 
-})();
\ No newline at end of file
+})();