diff --git a/requirements.txt b/requirements.txt
index f90342f..4bbaf02 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ python-dateutil==2.8.0
 qrcode[pil]==6.1
 requests==2.21.0
 pyserial==3.4
-slackclient==2.5.0
 ansicolors==1.1.8
 pytest
 flake8==5.0.4
+slack_sdk==3.21.3
diff --git a/src/util/slack_client.py b/src/util/slack_client.py
index a742638..6d4fa55 100644
--- a/src/util/slack_client.py
+++ b/src/util/slack_client.py
@@ -1,10 +1,11 @@
 from src.util.logger import get_logger
-import slack
-from asyncio import TimeoutError
+from slack_sdk import WebClient
+from slack_sdk.errors import SlackApiError, SlackClientError
 import config
 import socket
 from src.util.token_config import TokenConfiguredClient, TokenExpiredError
 
+
 logger = get_logger()
 
 hostname = socket.gethostname()
@@ -16,7 +17,7 @@ class SlackTokenExpiredError(TokenExpiredError):
 
 class SlackClient(TokenConfiguredClient):
     def __init__(self, token_path, channel_id, timeout=1, token=None):
-        self.client = slack.WebClient(token, timeout=timeout)
+        self.client = WebClient(token, timeout=timeout)
         self.token_path = token_path
         self.channel_id = channel_id
         if token:
@@ -36,11 +37,9 @@ def _post_message(self, msg):
                 link_names=True)
             if not response['ok']:
                 logger.error(f'Slack error, response = {response}')
-        except TimeoutError:
-            logger.error("Slack request timed out.")
-        except slack.errors.SlackApiError as e:
+        except SlackApiError as e:
             raise SlackTokenExpiredError(str(e))
-        except slack.errors.SlackClientError as e:
+        except SlackClientError as e:
             logger.exception(f'Slack error, error = {e}')
 
     @TokenConfiguredClient.require_configured_factory()