diff --git a/zulip_bots/zulip_bots/lib.py b/zulip_bots/zulip_bots/lib.py
index d91a846..482bf4d 100644
--- a/zulip_bots/zulip_bots/lib.py
+++ b/zulip_bots/zulip_bots/lib.py
@@ -142,12 +142,13 @@ class ExternalBotHandler(object):
             self._rate_limit.show_error_and_exit()
         return self._client.send_message(message)
 
-    def send_reply(self, message: Dict[str, Any], response: str) -> Dict[str, Any]:
+    def send_reply(self, message: Dict[str, Any], response: str, widget_content: Optional[str]=None) -> Dict[str, Any]:
         if message['type'] == 'private':
             return self.send_message(dict(
                 type='private',
                 to=[x['email'] for x in message['display_recipient'] if self.email != x['email']],
                 content=response,
+                widget_content=widget_content,
             ))
         else:
             return self.send_message(dict(
@@ -155,6 +156,7 @@ class ExternalBotHandler(object):
                 to=message['display_recipient'],
                 subject=message['subject'],
                 content=response,
+                widget_content=widget_content,
             ))
 
     def update_message(self, message: Dict[str, Any]) -> Dict[str, Any]:
diff --git a/zulip_bots/zulip_bots/test_lib.py b/zulip_bots/zulip_bots/test_lib.py
index 1cedea4..4a3b190 100755
--- a/zulip_bots/zulip_bots/test_lib.py
+++ b/zulip_bots/zulip_bots/test_lib.py
@@ -1,6 +1,6 @@
 import unittest
 
-from typing import List, Dict, Any, Tuple
+from typing import List, Dict, Any, Tuple, Optional
 
 from zulip_bots.custom_exceptions import (
     ConfigValidationError,
@@ -41,9 +41,11 @@ class StubBotHandler:
         self.transcript.append(('send_message', message))
         return self.message_server.send(message)
 
-    def send_reply(self, message: Dict[str, Any], response: str) -> Dict[str, Any]:
+    def send_reply(self, message: Dict[str, Any], response: str,
+                   widget_content: Optional[str]=None) -> Dict[str, Any]:
         response_message = dict(
-            content=response
+            content=response,
+            widget_content=widget_content
         )
         self.transcript.append(('send_reply', response_message))
         return self.message_server.send(response_message)
diff --git a/zulip_bots/zulip_bots/tests/test_lib.py b/zulip_bots/zulip_bots/tests/test_lib.py
index a974845..63ec939 100644
--- a/zulip_bots/zulip_bots/tests/test_lib.py
+++ b/zulip_bots/zulip_bots/tests/test_lib.py
@@ -110,16 +110,17 @@ class LibTest(TestCase):
         )
         to = {'email': 'Some@User'}
         expected = [({'type': 'private', 'display_recipient': [to]},
-                     {'type': 'private', 'to': [to['email']]}),
+                     {'type': 'private', 'to': [to['email']]}, None),
                     ({'type': 'private', 'display_recipient': [to, profile]},
-                     {'type': 'private', 'to': [to['email']]}),
+                     {'type': 'private', 'to': [to['email']]}, 'widget_content'),
                     ({'type': 'stream', 'display_recipient': 'Stream name', 'subject': 'Topic'},
-                     {'type': 'stream', 'to': 'Stream name', 'subject': 'Topic'})]
+                     {'type': 'stream', 'to': 'Stream name', 'subject': 'Topic'}, 'test widget')]
         response_text = "Response"
         for test in expected:
             client.send_message = MagicMock()
-            handler.send_reply(test[0], response_text)
-            client.send_message.assert_called_once_with(dict(test[1], content=response_text))
+            handler.send_reply(test[0], response_text, test[2])
+            client.send_message.assert_called_once_with(dict(
+                test[1], content=response_text, widget_content=test[2]))
 
     def test_content_and_full_content(self):
         client = FakeClient()