diff --git a/CHANGELOG.md b/CHANGELOG.md
index 57b046c..25ef9c3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+## 3.1.5
+* Prevent double click
+
 ## 3.1.4
 * Ignore all notification after COMPLETED
 * Cut too long product name
diff --git a/upload/catalog/controller/payment/payu.php b/upload/catalog/controller/payment/payu.php
index cb5a809..ab483a7 100644
--- a/upload/catalog/controller/payment/payu.php
+++ b/upload/catalog/controller/payment/payu.php
@@ -1,7 +1,7 @@
 <?php
 
 /*
-* ver. 3.1.4
+* ver. 3.1.5
 * PayU Payment Modules
 *
 * @copyright  Copyright 2016 by PayU
@@ -19,7 +19,7 @@ class ControllerPaymentPayU extends Controller
 
     const PAY_BUTTON = 'https://static.payu.com/pl/standard/partners/buttons/payu_account_button_01.png';
 
-    const VERSION = '3.1.4';
+    const VERSION = '3.1.5';
 
     private $ocr = array();
     private $totalWithoutDiscount = 0;
diff --git a/upload/catalog/view/theme/default/template/payment/payu.tpl b/upload/catalog/view/theme/default/template/payment/payu.tpl
index f7b92cd..984d984 100644
--- a/upload/catalog/view/theme/default/template/payment/payu.tpl
+++ b/upload/catalog/view/theme/default/template/payment/payu.tpl
@@ -8,26 +8,31 @@
 </div>
 <div id="payu-error"></div>
 <script type="text/javascript"><!--
+    var isClicked = false;
     $('#payu-pay').on('click', function() {
-        $.ajax({
-            type: 'get',
-            url: '<?php echo $action; ?>',
-            cache: false,
-            dataType: 'json',
-            beforeSend: function () {
-                $('#payu-error').empty();
-                $('#payu-pay').css('cursor', 'wait');
-            },
-            complete: function () {
-                $('#payu-pay').css('cursor', 'pointer');
-            },
-            success: function (ret) {
-                if (ret.status == 'SUCCESS') {
-                    location = ret.redirectUri
-                } else {
-                    $('#payu-error').empty().append(ret.message);
+        if (isClicked === false) {
+            isClicked = true;
+            $.ajax({
+                type: 'get',
+                url: '<?php echo $action; ?>',
+                cache: false,
+                dataType: 'json',
+                beforeSend: function () {
+                    $('#payu-error').empty();
+                    $('#payu-pay').css('cursor', 'wait');
+                },
+                complete: function () {
+                    $('#payu-pay').css('cursor', 'pointer');
+                },
+                success: function (ret) {
+                    if (ret.status === 'SUCCESS') {
+                        location = ret.redirectUri
+                    } else {
+                        $('#payu-error').empty().append(ret.message);
+                        isClicked = false;
+                    }
                 }
-            }
-        });
+            });
+        }
     });
 //--></script>