diff --git a/data/promote.telegram.org.html b/data/promote.telegram.org.html
index 93d30e1d16..83a077340f 100644
--- a/data/promote.telegram.org.html
+++ b/data/promote.telegram.org.html
@@ -110,9 +110,9 @@
 <script src="/js/jquery-ui.min.js?1"></script>
 <script src="/js/jquery-ex.js?11"></script>
 <script src="/js/tchart.min.js?18"></script>
-<script src="/js/health.js?17"></script>
+<script src="/js/health.js?18"></script>
 
-    <script>ajInit({"version":573,"apiUrl":"\/api?hash=telegram-crawler","unauth":true});</script>
+    <script>ajInit({"version":574,"apiUrl":"\/api?hash=telegram-crawler","unauth":true});</script>
     <script id="aj_script">l.add({"WEB_AB_WARNING_HEADER":"Turn off ad blocker","WEB_POPUP_CLOSE_BTN":"Close","WEB_AB_WARNING_TEXT":"You appear to be using an ad blocker that may prevent pages on the Telegram Ad Platform from working as expected.<br\/><br\/>Please turn off your ad blocker or add <a href=\"http:\/\/promote.telegram.org\/\">promote.telegram.org<\/a> as an exception to manage your promoted messages."});
 window.enableInlineVideo&&$('video').each(function(){enableInlineVideo(this)});
 Ads.init();
diff --git a/data/promote.telegram.org/auth.html b/data/promote.telegram.org/auth.html
index 11707bb528..bfe85c94e3 100644
--- a/data/promote.telegram.org/auth.html
+++ b/data/promote.telegram.org/auth.html
@@ -110,9 +110,9 @@
 <script src="/js/jquery-ui.min.js?1"></script>
 <script src="/js/jquery-ex.js?11"></script>
 <script src="/js/tchart.min.js?18"></script>
-<script src="/js/health.js?17"></script>
+<script src="/js/health.js?18"></script>
 
-    <script>ajInit({"version":573,"apiUrl":"\/api?hash=telegram-crawler","unauth":true});</script>
+    <script>ajInit({"version":574,"apiUrl":"\/api?hash=telegram-crawler","unauth":true});</script>
     <script id="aj_script">l.add({"WEB_AB_WARNING_HEADER":"Turn off ad blocker","WEB_POPUP_CLOSE_BTN":"Close","WEB_AB_WARNING_TEXT":"You appear to be using an ad blocker that may prevent pages on the Telegram Ad Platform from working as expected.<br\/><br\/>Please turn off your ad blocker or add <a href=\"http:\/\/promote.telegram.org\/\">promote.telegram.org<\/a> as an exception to manage your promoted messages."});
 openPopup('#login-popup-container');
 window.enableInlineVideo&&$('video').each(function(){enableInlineVideo(this)});
diff --git a/data/promote.telegram.org/basics.html b/data/promote.telegram.org/basics.html
index 93d30e1d16..83a077340f 100644
--- a/data/promote.telegram.org/basics.html
+++ b/data/promote.telegram.org/basics.html
@@ -110,9 +110,9 @@
 <script src="/js/jquery-ui.min.js?1"></script>
 <script src="/js/jquery-ex.js?11"></script>
 <script src="/js/tchart.min.js?18"></script>
-<script src="/js/health.js?17"></script>
+<script src="/js/health.js?18"></script>
 
-    <script>ajInit({"version":573,"apiUrl":"\/api?hash=telegram-crawler","unauth":true});</script>
+    <script>ajInit({"version":574,"apiUrl":"\/api?hash=telegram-crawler","unauth":true});</script>
     <script id="aj_script">l.add({"WEB_AB_WARNING_HEADER":"Turn off ad blocker","WEB_POPUP_CLOSE_BTN":"Close","WEB_AB_WARNING_TEXT":"You appear to be using an ad blocker that may prevent pages on the Telegram Ad Platform from working as expected.<br\/><br\/>Please turn off your ad blocker or add <a href=\"http:\/\/promote.telegram.org\/\">promote.telegram.org<\/a> as an exception to manage your promoted messages."});
 window.enableInlineVideo&&$('video').each(function(){enableInlineVideo(this)});
 Ads.init();
diff --git a/data/promote.telegram.org/getting-started.html b/data/promote.telegram.org/getting-started.html
index c97c3d38a0..e0d23b4ad7 100644
--- a/data/promote.telegram.org/getting-started.html
+++ b/data/promote.telegram.org/getting-started.html
@@ -226,9 +226,9 @@
 <script src="/js/jquery-ui.min.js?1"></script>
 <script src="/js/jquery-ex.js?11"></script>
 <script src="/js/tchart.min.js?18"></script>
-<script src="/js/health.js?17"></script>
+<script src="/js/health.js?18"></script>
 
-    <script>ajInit({"version":573,"apiUrl":"\/api?hash=telegram-crawler","unauth":true});</script>
+    <script>ajInit({"version":574,"apiUrl":"\/api?hash=telegram-crawler","unauth":true});</script>
     <script id="aj_script">l.add({"WEB_AB_WARNING_HEADER":"Turn off ad blocker","WEB_POPUP_CLOSE_BTN":"Close","WEB_AB_WARNING_TEXT":"You appear to be using an ad blocker that may prevent pages on the Telegram Ad Platform from working as expected.<br\/><br\/>Please turn off your ad blocker or add <a href=\"http:\/\/promote.telegram.org\/\">promote.telegram.org<\/a> as an exception to manage your promoted messages."});
 window.enableInlineVideo&&$('video').each(function(){enableInlineVideo(this)});
 Ads.init();
diff --git a/data/promote.telegram.org/guidelines.html b/data/promote.telegram.org/guidelines.html
index 7055ec1b11..e1c651cf92 100644
--- a/data/promote.telegram.org/guidelines.html
+++ b/data/promote.telegram.org/guidelines.html
@@ -218,9 +218,9 @@
 <script src="/js/jquery-ui.min.js?1"></script>
 <script src="/js/jquery-ex.js?11"></script>
 <script src="/js/tchart.min.js?18"></script>
-<script src="/js/health.js?17"></script>
+<script src="/js/health.js?18"></script>
 
-    <script>ajInit({"version":573,"apiUrl":"\/api?hash=telegram-crawler","unauth":true});</script>
+    <script>ajInit({"version":574,"apiUrl":"\/api?hash=telegram-crawler","unauth":true});</script>
     <script id="aj_script">l.add({"WEB_AB_WARNING_HEADER":"Turn off ad blocker","WEB_POPUP_CLOSE_BTN":"Close","WEB_AB_WARNING_TEXT":"You appear to be using an ad blocker that may prevent pages on the Telegram Ad Platform from working as expected.<br\/><br\/>Please turn off your ad blocker or add <a href=\"http:\/\/promote.telegram.org\/\">promote.telegram.org<\/a> as an exception to manage your promoted messages."});
 window.enableInlineVideo&&$('video').each(function(){enableInlineVideo(this)});
 Ads.init();
diff --git a/data/promote.telegram.org/js/health.js b/data/promote.telegram.org/js/health.js
index a4f3563968..0e11ae25bc 100644
--- a/data/promote.telegram.org/js/health.js
+++ b/data/promote.telegram.org/js/health.js
@@ -35,7 +35,7 @@ function fetchGraph(id, tokenData, retry) {
   }
   var loadingEl = domEl.querySelector('.chart_wrap_loading');
   retry = retry || 0;
-  return fetch('/asyncgraph', {
+  return fetch('/asyncgraph' + (tokenData.test ? '?_test=1' : ''), {
     method: 'post',
     headers: {
       "Content-type": "application/x-www-form-urlencoded; charset=UTF-8"
diff --git a/data/promote.telegram.org/tos.html b/data/promote.telegram.org/tos.html
index 9606afc7dd..26f9f71c27 100644
--- a/data/promote.telegram.org/tos.html
+++ b/data/promote.telegram.org/tos.html
@@ -158,9 +158,9 @@
 <script src="/js/jquery-ui.min.js?1"></script>
 <script src="/js/jquery-ex.js?11"></script>
 <script src="/js/tchart.min.js?18"></script>
-<script src="/js/health.js?17"></script>
+<script src="/js/health.js?18"></script>
 
-    <script>ajInit({"version":573,"apiUrl":"\/api?hash=telegram-crawler","unauth":true});</script>
+    <script>ajInit({"version":574,"apiUrl":"\/api?hash=telegram-crawler","unauth":true});</script>
     <script id="aj_script">l.add({"WEB_AB_WARNING_HEADER":"Turn off ad blocker","WEB_POPUP_CLOSE_BTN":"Close","WEB_AB_WARNING_TEXT":"You appear to be using an ad blocker that may prevent pages on the Telegram Ad Platform from working as expected.<br\/><br\/>Please turn off your ad blocker or add <a href=\"http:\/\/promote.telegram.org\/\">promote.telegram.org<\/a> as an exception to manage your promoted messages."});
 window.enableInlineVideo&&$('video').each(function(){enableInlineVideo(this)});
 Ads.init();
diff --git a/data/telegram.org/js/telegram-web-app.js b/data/telegram.org/js/telegram-web-app.js
index ae2acc5f63..040e5bd502 100644
--- a/data/telegram.org/js/telegram-web-app.js
+++ b/data/telegram.org/js/telegram-web-app.js
@@ -681,6 +681,21 @@
     return mainButton;
   })();
 
+  var webAppInvoices = {};
+  function onInvoiceClosed(eventType, eventData) {
+    if (eventData.slug && webAppInvoices[eventData.slug]) {
+      var invoiceData = webAppInvoices[eventData.slug];
+      delete webAppInvoices[eventData.slug];
+      if (invoiceData.callback) {
+        invoiceData.callback(eventData.status);
+      }
+      receiveWebViewEvent('invoiceClosed', {
+        url: invoiceData.url,
+        status: eventData.status
+      });
+    }
+  }
+
   if (!window.Telegram) {
     window.Telegram = {};
   }
@@ -740,7 +755,7 @@
     }
     WebView.postEvent('web_app_data_send', false, {data: data});
   };
-  WebApp.openTgLink = function (url) {
+  WebApp.openTelegramLink = function (url) {
     var a = document.createElement('A');
     a.href = url;
     if (a.protocol != 'http:' &&
@@ -759,6 +774,31 @@
       location.href = 'https://t.me' + path_full;
     }
   };
+  WebApp.openInvoice = function (url, callback) {
+    var a = document.createElement('A'), match, slug;
+    a.href = url;
+    if (a.protocol != 'http:' &&
+        a.protocol != 'https:' ||
+        a.hostname != 't.me' ||
+        !(match = a.pathname.match(/^\/(\$|invoice\/)([A-Za-z0-9\-_=]+)$/)) ||
+        !(slug = match[2])) {
+      console.error('[Telegram.WebApp] Invoice url is invalid', url);
+      throw Error('WebAppInvoiceUrlInvalid');
+    }
+    if (!versionAtLeast('1.1')) {
+      console.error('[Telegram.WebApp] Method openInvoice is not supported in version ' + webAppVersion);
+      throw Error('WebAppMethodUnsupported');
+    }
+    if (webAppInvoices[slug]) {
+      console.error('[Telegram.WebApp] Invoice is already opened');
+      throw Error('WebAppInvoiceOpened');
+    }
+    webAppInvoices[slug] = {
+      url: url,
+      callback: callback
+    };
+    WebView.postEvent('web_app_open_invoice', false, {slug: slug});
+  };
   WebApp.ready = function () {
     WebView.postEvent('web_app_ready');
   };
@@ -780,6 +820,7 @@
 
   WebView.onEvent('theme_changed', onThemeChanged);
   WebView.onEvent('viewport_changed', onViewportChanged);
+  WebView.onEvent('invoice_closed', onInvoiceClosed);
   WebView.postEvent('web_app_request_theme');
   WebView.postEvent('web_app_request_viewport');
 
diff --git a/data/webappcontent.telegram.org/cafe.html b/data/webappcontent.telegram.org/cafe.html
index de81fffd36..82eb40143b 100644
--- a/data/webappcontent.telegram.org/cafe.html
+++ b/data/webappcontent.telegram.org/cafe.html
@@ -9,7 +9,7 @@
     <meta name="MobileOptimized" content="176" />
     <meta name="HandheldFriendly" content="True" />
     <meta name="robots" content="noindex, nofollow" />
-    <script src="https://tg.dev/js/telegram-web-app.js?7"></script>
+    <script src="https://tg.dev/js/telegram-web-app.js?8"></script>
     <script>
       function setThemeClass() {
         document.documentElement.className = Telegram.WebApp.colorScheme;
@@ -441,7 +441,7 @@
 </div>
     <script src="https://tg.dev/js/jquery.min.js"></script>
     <script src="https://tg.dev/js/tgsticker.js?27"></script>
-    <script src="/js/cafe.js?17"></script>
+    <script src="/js/cafe.js?18"></script>
     <script>Cafe.init({"apiUrl":"\/cafe\/api","userId":0,"userHash":null});</script>
   </body>
 </html>
diff --git a/data/webappcontent.telegram.org/demo.html b/data/webappcontent.telegram.org/demo.html
index c10f4d795e..28d073dab7 100644
--- a/data/webappcontent.telegram.org/demo.html
+++ b/data/webappcontent.telegram.org/demo.html
@@ -8,7 +8,7 @@
     <meta name="MobileOptimized" content="176" />
     <meta name="HandheldFriendly" content="True" />
     <meta name="robots" content="noindex,nofollow" />
-    <script src="https://telegram.org/js/telegram-web-app.js?7"></script>
+    <script src="https://telegram.org/js/telegram-web-app.js?8"></script>
     <script>
       function setThemeClass() {
         document.documentElement.className = Telegram.WebApp.colorScheme;
@@ -170,6 +170,7 @@
         <li><a href="https://telegram.org/" target="_blank">target="_blank" link</a> (opens outside webview)</li>
         <li><a href="javascript:window.open('https://telegram.org/');">window.open() link</a> (opens outside webview)</li>
         <li><a href="https://t.me/like">LikeBot t.me link</a> (opens inside Telegram app)</li>
+        <li><a href="javascript:Telegram.WebApp.openTelegramLink('https://t.me/VoteBot');">web_app_open_tg_link()</a> (opens inside Telegram app)</li>
         <li><a href="tg://resolve?domain=vote">VoteBot tg:// link</a> (does not open)</li>
       </ul>
       <p>Test permissions:</p>
diff --git a/data/webappcontent.telegram.org/js/cafe.js b/data/webappcontent.telegram.org/js/cafe.js
index 2ac536fe08..2bbbd067f2 100644
--- a/data/webappcontent.telegram.org/js/cafe.js
+++ b/data/webappcontent.telegram.org/js/cafe.js
@@ -259,11 +259,27 @@ var Cafe = {
         params.user_id = Cafe.userId;
         params.user_hash = Cafe.userHash;
       }
+      var invoiceSupported = Telegram.WebApp.isVersionAtLeast('1.1');
+      if (invoiceSupported) {
+        params.invoice = 1;
+      }
       Cafe.toggleLoading(true);
       Cafe.apiRequest('makeOrder', params, function(result) {
         Cafe.toggleLoading(false);
         if (result.ok) {
-          Telegram.WebApp.close();
+          if (invoiceSupported) {
+            Telegram.WebApp.openInvoice(result.invoice_url, function(status) {
+              if (status == 'paid') {
+                Telegram.WebApp.close();
+              } else if (status == 'failed') {
+                Cafe.showStatus('Payment has been failed.');
+              } else {
+                Cafe.showStatus('You have cancelled this order.');
+              }
+            });
+          } else {
+            Telegram.WebApp.close();
+          }
         }
         if (result.error) {
           Cafe.showStatus(result.error);