diff --git a/README.md b/README.md
index 098089d7..c7a3e912 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,9 @@ SearchX is a multipurpose Telegram bot written in Python for Google Drive
 - Set data permission in Google Drive
 - Size Limit support for Clone, Compression and Extraction tasks
 - Destination change support for Clone tasks
-- MongoDB support for storing the list of authorized users
+- MongoDB database support
+- Bookmark support for storing Destination Drive IDs into database
+- Support for storing the list of authorized users into database
 - Index Link support
 - Multi-token telegraph support
 - Multi-page telegraph page results
@@ -62,8 +64,11 @@ cancel - Cancel a task
 status - Get status of all tasks
 share - Set data permission in Google Drive
 del - Delete data from Google Drive
-authorize - Grant authorization of an user
-unauthorize - Revoke authorization of an user
+addbm - Add bookmark of a destination drive
+rembm - Remove bookmark of a destination drive
+bookmarks - Get the list of bookmarked destination drives
+auth - Grant authorization of an user
+unauth - Revoke authorization of an user
 users - Get the list of authorized users
 shell - Execute shell commands
 eval - Evaluate Python expressions
diff --git a/bot/modules/clone.py b/bot/modules/clone.py
index e06c3919..f44ddd0d 100644
--- a/bot/modules/clone.py
+++ b/bot/modules/clone.py
@@ -25,14 +25,20 @@ def cloneNode(update, context):
         link = args[1].strip()
         try:
             key = args[2].strip()
-            dest_id = BOOKMARKS[key]
+            try:
+                dest_id = BOOKMARKS[key]
+            except KeyError:
+                return sendMessage("Invalid Drive Key", context.bot, update.message)
         except IndexError:
             pass
     if reply_to:
         link = reply_to.text.split(maxsplit=1)[0].strip()
         try:
             key = args[1].strip()
-            dest_id = BOOKMARKS[key]
+            try:
+                dest_id = BOOKMARKS[key]
+            except KeyError:
+                return sendMessage("Invalid Drive Key", context.bot, update.message)
         except IndexError:
             pass
     is_gdtot = is_gdtot_link(link)