diff --git a/README.md b/README.md
index 7f6e8ff..dbea9f8 100644
--- a/README.md
+++ b/README.md
@@ -7,3 +7,7 @@ Telegram Bot for booking UZ railway tickets
 # Purpose
 Sometimes it's hard to book a ticket on a busy train.
 This bot automates available tickets monitoring and books a ticket once it's possible.
+
+# Update session ID bookmarklet:
+Just open [the page](http://vit-.github.io/telegram-uz-bot/bookmarklet.html) and add link (on the opened page) as bookmark or drag&drop to bookmark bar. 
+After that you'll just need to click on it on the UZ page to enter Session ID and update it on the site automatically.
diff --git a/bookmarklet.html b/bookmarklet.html
new file mode 100644
index 0000000..2d80ab9
--- /dev/null
+++ b/bookmarklet.html
@@ -0,0 +1 @@
+<a href="javascript:(function(){a=prompt('Enter Session ID');if(!a){return alert('Please try again')};a=a.replace(/^\s+|\s+$/g,'');document.cookie='_gv_sessid='+a+';path=/';})();">BOOKMARKLET</a>