diff --git a/README.md b/README.md
index 53766e2..c3ce103 100644
--- a/README.md
+++ b/README.md
@@ -44,6 +44,10 @@ Visit our [Help Center](https://help.tawk.to/) for answers to FAQs
 
 ## Changelog
 
+### 1.4.1
+* Added function for widget selection iframe to auto resize.
+* Provided platform identifier to widget selection iframe.
+
 ### 1.4.0
 * Added enable/disable option for visitor recognition feature.
 
diff --git a/admin/view/template/extension/module/tawkto.tpl b/admin/view/template/extension/module/tawkto.tpl
index 2f4023f..86d0576 100644
--- a/admin/view/template/extension/module/tawkto.tpl
+++ b/admin/view/template/extension/module/tawkto.tpl
@@ -184,7 +184,7 @@
 
 <script>
 var currentHost = window.location.protocol + '//' + window.location.host,
-url = '<?php echo $iframe_url ?>&parentDomain=' + currentHost,
+url = '<?php echo $iframe_url ?>&pltf=opencart&pltfv=2&parentDomain=' + currentHost,
 baseUrl = '<?php echo $base_url ?>',
 storeHierarchy = <?php echo json_encode($hierarchy) ?>;
 
@@ -210,9 +210,26 @@ window.addEventListener('message', function(e) {
         if(e.data.action === 'getIdValues') {
             e.source.postMessage({action: 'idValues', values : storeHierarchy}, baseUrl);
         }
+
+        if(e.data.action === 'reloadHeight') {
+            reloadIframeHeight(e.data.height);
+        }
     }
 });
 
+function reloadIframeHeight(height) {
+    if (!height) {
+        return;
+    }
+
+    var iframe = jQuery('#tawkIframe');
+    if (height === iframe.height()) {
+        return;
+    }
+
+    iframe.height(height);
+}
+
 function setTawkWidget(e) {
     var store_layout = e.data.id;
     jQuery.post('<?php echo $url['set_widget_url']; ?>', {