diff --git a/libraries/botbuilder-adapters-slack/botbuilder/adapters/slack/slack_client.py b/libraries/botbuilder-adapters-slack/botbuilder/adapters/slack/slack_client.py
index 42fb96e81..0911ce965 100644
--- a/libraries/botbuilder-adapters-slack/botbuilder/adapters/slack/slack_client.py
+++ b/libraries/botbuilder-adapters-slack/botbuilder/adapters/slack/slack_client.py
@@ -10,13 +10,13 @@
 import aiohttp
 from aiohttp.web_request import Request
 
+from slack.web.client import WebClient
+from slack.web.slack_response import SlackResponse
+
 from botbuilder.schema import Activity
 from botbuilder.adapters.slack import SlackAdapterOptions
 from botbuilder.adapters.slack.slack_message import SlackMessage
 
-from slack.web.client import WebClient
-from slack.web.slack_response import SlackResponse
-
 POST_MESSAGE_URL = "https://slack.com/api/chat.postMessage"
 POST_EPHEMERAL_MESSAGE_URL = "https://slack.com/api/chat.postEphemeral"
 
diff --git a/libraries/botbuilder-adapters-slack/botbuilder/adapters/slack/slack_helper.py b/libraries/botbuilder-adapters-slack/botbuilder/adapters/slack/slack_helper.py
index e15604442..de5b7e672 100644
--- a/libraries/botbuilder-adapters-slack/botbuilder/adapters/slack/slack_helper.py
+++ b/libraries/botbuilder-adapters-slack/botbuilder/adapters/slack/slack_helper.py
@@ -7,6 +7,8 @@
 from aiohttp.web_request import Request
 from aiohttp.web_response import Response
 
+from slack.web.classes.attachments import Attachment
+
 from botbuilder.schema import (
     Activity,
     ConversationAccount,
@@ -14,8 +16,6 @@
     ActivityTypes,
 )
 
-from slack.web.classes.attachments import Attachment
-
 from .slack_message import SlackMessage
 from .slack_client import SlackClient
 from .slack_event import SlackEvent
@@ -53,7 +53,7 @@ def activity_to_slack(activity: Activity) -> SlackMessage:
                         message.blocks = att.content
                     else:
                         new_attachment = Attachment(
-                            author_name=att.name, thumb_url=att.thumbnail_url,
+                            author_name=att.name, thumb_url=att.thumbnail_url, text="",
                         )
                         attachments.append(new_attachment)
 
diff --git a/libraries/botbuilder-adapters-slack/botbuilder/adapters/slack/slack_payload.py b/libraries/botbuilder-adapters-slack/botbuilder/adapters/slack/slack_payload.py
index 0be8e3666..d5d87a225 100644
--- a/libraries/botbuilder-adapters-slack/botbuilder/adapters/slack/slack_payload.py
+++ b/libraries/botbuilder-adapters-slack/botbuilder/adapters/slack/slack_payload.py
@@ -2,10 +2,8 @@
 # Licensed under the MIT License.
 
 from typing import Optional, List
-
-from botbuilder.adapters.slack.slack_message import SlackMessage
-
 from slack.web.classes.actions import Action
+from botbuilder.adapters.slack.slack_message import SlackMessage
 
 
 class SlackPayload:
diff --git a/libraries/botbuilder-adapters-slack/setup.py b/libraries/botbuilder-adapters-slack/setup.py
index 666e321f2..42990d15b 100644
--- a/libraries/botbuilder-adapters-slack/setup.py
+++ b/libraries/botbuilder-adapters-slack/setup.py
@@ -8,6 +8,8 @@
     "botbuilder-schema==4.10.0",
     "botframework-connector==4.10.0",
     "botbuilder-core==4.10.0",
+    "pyslack",
+    "slackclient",
 ]
 
 TEST_REQUIRES = ["aiounittest==1.3.0"]
@@ -32,7 +34,7 @@
     long_description=long_description,
     long_description_content_type="text/x-rst",
     license=package_info["__license__"],
-    packages=["botbuilder.adapters", "botbuilder.adapters.slack",],
+    packages=["botbuilder.adapters.slack"],
     install_requires=REQUIRES + TEST_REQUIRES,
     tests_require=TEST_REQUIRES,
     include_package_data=True,