diff --git a/css/style.css b/css/style.css
index 4d7c8d5..391f83a 100644
--- a/css/style.css
+++ b/css/style.css
@@ -72,7 +72,11 @@ h1 br {
 
 #achievements-container .alert-text,
 #messages-container .alert-text {
-  font-size: 14px; font-weight: bold;
+  font-size: 14px;
+}
+
+#achievements-container .alert-text {
+  font-weight: bold;
 }
 
 #messages-container .btn {
diff --git a/index.html b/index.html
index 95df588..9b89a96 100644
--- a/index.html
+++ b/index.html
@@ -210,7 +210,7 @@
     <script src="js/event.js"></script>
     <script src="js/detector.js"></script>
     <script src="js/achievements.js"></script>
-    <script src="js/game.js"></script>
     <script src="js/ui.js"></script>
+    <script src="js/game.js"></script>
   </body>
 </html>
diff --git a/js/game.js b/js/game.js
index b7b5af5..7c7363d 100644
--- a/js/game.js
+++ b/js/game.js
@@ -5,6 +5,8 @@
   var workers = GameObjects.workers;
   var upgrades = GameObjects.upgrades;
 
+  UI.validateVersion(lab.version);
+
   achievements.addResearch(research);
   achievements.addWorkers(workers);
   
diff --git a/js/gameobjects.js b/js/gameobjects.js
index bbf8fc7..c037796 100644
--- a/js/gameobjects.js
+++ b/js/gameobjects.js
@@ -8,6 +8,7 @@ var GameObjects = (function() {
   /** Lab
    */
   var labPrototype = {
+    version: '0.2',
     name: 'My Awesome Lab',
     detector: {
       rate: 1
diff --git a/js/helpers.js b/js/helpers.js
index 8aad0bc..f569d59 100644
--- a/js/helpers.js
+++ b/js/helpers.js
@@ -37,6 +37,7 @@ var Helpers = (function() {
  
   return {
     loadFile: loadFile,
-    formatNumberPostfix: formatNumberPostfix
+    formatNumberPostfix: formatNumberPostfix,
+    version: '0.2'
   };
 })();
diff --git a/js/ui.js b/js/ui.js
index 5034cc4..567abdf 100644
--- a/js/ui.js
+++ b/js/ui.js
@@ -51,6 +51,25 @@ var UI = (function () {
     }});
   }
 
+  var validateVersion = function(version) {
+    if (version != Helpers.version) {
+      var alert = '<div id="outofdate" class="alert alert-info alert-dismissible" role="alert">';
+      alert += '<button type="button" class="close" data-dismiss="alert"><span aria-hidden="true">&times;</span><span class="sr-only">Close</span></button>';
+      alert += '<span class="glyphicon glyphicon-info-sign alert-glyph"></span> <span class="alert-text">Your saved state out of date. <a href="#"><strong>Restart</strong></a> to use latest version of the game.</span>';
+      alert += '</div>';
+      alert = $(alert);
+      alert.find('a').click(function ()
+      {
+        if (window.confirm('Do you really want to restart the game? All progress will be lost.')) {
+          ObjectStorage.clear();
+          window.location.reload(true);
+        }
+      })
+
+      $('#messages-container').append(alert);
+    }
+  }
+
   if (typeof $.cookie('cookielaw') === 'undefined') {
     var alert = '<div id="cookielaw" class="alert alert-info" role="alert">';
     alert += '<button type="button" class="btn btn-primary">OK</button>';
@@ -68,7 +87,8 @@ var UI = (function () {
 
   return {
     showModal: showModal,
-    showUpdateValue: showUpdateValue
+    showUpdateValue: showUpdateValue,
+    validateVersion: validateVersion
   }
 })();