diff --git a/data/core.telegram.org/widgets/discussion.html b/data/core.telegram.org/widgets/discussion.html
index 8b0777d94c..030bf7db75 100644
--- a/data/core.telegram.org/widgets/discussion.html
+++ b/data/core.telegram.org/widgets/discussion.html
@@ -217,7 +217,7 @@
 <script src="/js/bootstrap.min.js"></script>
 <script src="/js/core-widgets.js?1"></script>
 
-    <script>DiscussionWidget.init({"default_link":"https:\/\/t.me\/durov\/126","link_error":"Invalid post link","widget_script":"https:\/\/telegram.org\/js\/telegram-widget.js?14"});
+    <script>DiscussionWidget.init({"default_link":"https:\/\/t.me\/durov\/126","link_error":"Invalid post link","widget_script":"https:\/\/telegram.org\/js\/telegram-widget.js?15"});
 backToTopInit("Go up");
 removePreloadInit();
 </script>
diff --git a/data/core.telegram.org/widgets/login.html b/data/core.telegram.org/widgets/login.html
index 67d2bc5a90..b0cd268ee0 100644
--- a/data/core.telegram.org/widgets/login.html
+++ b/data/core.telegram.org/widgets/login.html
@@ -317,7 +317,7 @@ function updateWidget(widget_update, init) {
     attrs += ' data-radius="' + escapeHTML(radius_value) + '"';
   }
   if (widget_update) {
-    var code = '<script async src="https://telegram.org/js/telegram-widget.js?14" data-telegram-login="samplebot" data-size="' + escapeHTML(size) + '"' + (!userpic ? ' data-userpic="false"' : '') + ' data-onauth="onTelegramAuth(user)"' + attrs + (form.request_write.checked ? ' data-request-access="write"' : '') + '><\/script>';
+    var code = '<script async src="https://telegram.org/js/telegram-widget.js?15" data-telegram-login="samplebot" data-size="' + escapeHTML(size) + '"' + (!userpic ? ' data-userpic="false"' : '') + ' data-onauth="onTelegramAuth(user)"' + attrs + (form.request_write.checked ? ' data-request-access="write"' : '') + '><\/script>';
     $('#widget_container').html(code);
   }
   var post_link = $('#post_link').val() || 'https://t.me/telegram/83',
@@ -330,7 +330,7 @@ function updateWidget(widget_update, init) {
     attrs += ' data-onauth="onTelegramAuth(user)"';
     html += "\n<script type=\"text/javascript\">\n  function onTelegramAuth(user) {\n    alert('Logged in as ' + user.first_name + ' ' + user.last_name + ' (' + user.id + (user.username ? ', @' + user.username : '') + ')');\n  }\n<\/script>";
   }
-  var code = '<script async src="https://telegram.org/js/telegram-widget.js?14" data-telegram-login="' + escapeHTML(bot_username || 'samplebot') + '" data-size="' + escapeHTML(size) + '"' + (!userpic ? ' data-userpic="false"' : '') + attrs + (form.request_write.checked ? ' data-request-access="write"' : '') + '><\/script>' + html;
+  var code = '<script async src="https://telegram.org/js/telegram-widget.js?15" data-telegram-login="' + escapeHTML(bot_username || 'samplebot') + '" data-size="' + escapeHTML(size) + '"' + (!userpic ? ' data-userpic="false"' : '') + attrs + (form.request_write.checked ? ' data-request-access="write"' : '') + '><\/script>' + html;
   $('#embed_code').val(code);
   $('#embed_code').height(0);
   $('#embed_code').height($('#embed_code').get(0).scrollHeight);
diff --git a/data/core.telegram.org/widgets/post.html b/data/core.telegram.org/widgets/post.html
index 1909302066..e56ad51075 100644
--- a/data/core.telegram.org/widgets/post.html
+++ b/data/core.telegram.org/widgets/post.html
@@ -231,7 +231,7 @@
 <script src="/js/bootstrap.min.js"></script>
 <script src="/js/core-widgets.js?1"></script>
 
-    <script>PostWidget.init({"default_link":"https:\/\/t.me\/telegram\/83","link_error":"Invalid post link","widget_script":"https:\/\/telegram.org\/js\/telegram-widget.js?14"});
+    <script>PostWidget.init({"default_link":"https:\/\/t.me\/telegram\/83","link_error":"Invalid post link","widget_script":"https:\/\/telegram.org\/js\/telegram-widget.js?15"});
 backToTopInit("Go up");
 removePreloadInit();
 </script>
diff --git a/data/core.telegram.org/widgets/share.html b/data/core.telegram.org/widgets/share.html
index a1f7d0fa24..48ce73e36f 100644
--- a/data/core.telegram.org/widgets/share.html
+++ b/data/core.telegram.org/widgets/share.html
@@ -231,7 +231,7 @@ function telegramForwardButton($url, $text = &#39;&#39;) {
   var button_size = form.button_size.value;
   var button_text = form.button_text.value;
   tfi.removeClass('is-invalid');
-  var code = '<script async src="https://telegram.org/js/telegram-widget.js?14" data-telegram-share-url="' + escapeHTML(share_url) + '"' + (share_comment ? ' data-comment="' + escapeHTML(share_comment) + '"' : '') + (button_size ? ' data-size="' + escapeHTML(button_size) + '"' : '') + (button_text ? ' data-text="' + escapeHTML(button_text) + '"' : '') + '><\/script>';
+  var code = '<script async src="https://telegram.org/js/telegram-widget.js?15" data-telegram-share-url="' + escapeHTML(share_url) + '"' + (share_comment ? ' data-comment="' + escapeHTML(share_comment) + '"' : '') + (button_size ? ' data-size="' + escapeHTML(button_size) + '"' : '') + (button_text ? ' data-text="' + escapeHTML(button_text) + '"' : '') + '><\/script>';
   $('#embed_code').val(code);
   $('#embed_code').height(0);
   $('#embed_code').height($('#embed_code').get(0).scrollHeight);
diff --git a/data/telegram.org/js/telegram-widget.js b/data/telegram.org/js/telegram-widget.js
index 94e16aa5ba..a1e4e6e65d 100644
--- a/data/telegram.org/js/telegram-widget.js
+++ b/data/telegram.org/js/telegram-widget.js
@@ -87,18 +87,34 @@
     }
   }
 
-  function postMessageToIframe(iframe, event, data) {
+  if (!window.Telegram) {
+    window.Telegram = {};
+  }
+  if (!window.Telegram.__WidgetUuid) {
+    window.Telegram.__WidgetUuid = 0;
+  }
+  if (!window.Telegram.__WidgetLastId) {
+    window.Telegram.__WidgetLastId = 0;
+  }
+  if (!window.Telegram.__WidgetCallbacks) {
+    window.Telegram.__WidgetCallbacks = {};
+  }
+
+  function postMessageToIframe(iframe, event, data, callback) {
     try {
       data = data || {};
       data.event = event;
+      if (callback) {
+        data._cb = ++window.Telegram.__WidgetLastId;
+        window.Telegram.__WidgetCallbacks[data._cb] = {
+          iframe: iframe,
+          callback: callback
+        };
+      }
       iframe.contentWindow.postMessage(JSON.stringify(data), '*');
     } catch(e) {}
   }
 
-  if (!window.__TgWidgetUuid) {
-    window.__TgWidgetUuid = 0;
-  }
-
   function initWidget(widgetEl) {
     var widgetId, widgetElId, widgetsOrigin, existsEl,
         src, styles = {}, allowedAttrs = [],
@@ -124,7 +140,7 @@
     }
     else if (widgetId = widgetEl.getAttribute('data-telegram-discussion')) {
       widgetsOrigin = getWidgetsOrigin('https://t.me', 'https://post.tg.dev');
-      widgetElId = 'telegram-discussion-' + widgetId.replace(/[^a-z0-9_]/ig, '-') + '-' + (++window.__TgWidgetUuid);
+      widgetElId = 'telegram-discussion-' + widgetId.replace(/[^a-z0-9_]/ig, '-') + '-' + (++window.Telegram.__WidgetUuid);
       var websitePageUrl = widgetEl.getAttribute('data-page-url');
       if (!websitePageUrl) {
         websitePageUrl = getPageCanonical();
@@ -273,6 +289,17 @@
       else if (data.event == 'unauthorized') {
         onUnauth && onUnauth();
       }
+      else if (data.event == 'callback') {
+        var cb_data = null;
+        if (cb_data = window.Telegram.__WidgetCallbacks[data._cb]) {
+          if (cb_data.iframe === iframe) {
+            cb_data.callback(data.value);
+            delete window.Telegram.__WidgetCallbacks[data._cb];
+          }
+        } else {
+          console.warn('Callback #' + data._cb + ' not found');
+        }
+      }
     }
     var iframe = document.createElement('iframe');
     iframe.id = widgetElId;
@@ -342,8 +369,23 @@
     return widgets;
   }
 
+  function getWidgetInfo(el_or_id, callback) {
+    var e = null, iframe = null;
+    if (el = geById(el_or_id)) {
+      if (el.tagName &&
+          el.tagName.toUpperCase() == 'IFRAME') {
+        iframe = el;
+      } else if (el._iframe) {
+        iframe = el._iframe;
+      }
+      if (iframe && callback) {
+        postMessageToIframe(iframe, 'get_info', {}, callback);
+      }
+    }
+  }
+
   function setWidgetOptions(options, el_or_id) {
-    var iframe;
+    var e = null, iframe = null;
     if (typeof el_or_id === 'undefined') {
       var widgets = getAllWidgets();
       for (var i = 0; i < widgets.length; i++) {
@@ -352,12 +394,14 @@
         }
       }
     } else {
-      if (iframe = geById(el_or_id)) {
-        if (iframe.tagName &&
-            iframe.tagName.toUpperCase() == 'IFRAME') {
-          postMessageToIframe(iframe, 'set_options', {options: options});
-        } else if (iframe._iframe) {
-          iframe = iframe._iframe;
+      if (el = geById(el_or_id)) {
+        if (el.tagName &&
+            el.tagName.toUpperCase() == 'IFRAME') {
+          iframe = el;
+        } else if (el._iframe) {
+          iframe = el._iframe;
+        }
+        if (iframe) {
           postMessageToIframe(iframe, 'set_options', {options: options});
         }
       }
@@ -460,9 +504,7 @@
     }
   };
 
-  if (!window.Telegram) {
-    window.Telegram = {};
-  }
+  window.Telegram.getWidgetInfo = getWidgetInfo;
   window.Telegram.setWidgetOptions = setWidgetOptions;
   window.Telegram.Login = {
     auth: TelegramLogin.auth,