diff --git a/homeassistant/components/notify/slack.py b/homeassistant/components/notify/slack.py
index 8f63fcd7a2f..fa7332326da 100644
--- a/homeassistant/components/notify/slack.py
+++ b/homeassistant/components/notify/slack.py
@@ -14,7 +14,7 @@ from homeassistant.const import (
     CONF_API_KEY, CONF_USERNAME, CONF_ICON)
 import homeassistant.helpers.config_validation as cv
 
-REQUIREMENTS = ['slacker==0.9.42']
+REQUIREMENTS = ['slacker==0.9.50']
 
 _LOGGER = logging.getLogger(__name__)
 
diff --git a/requirements_all.txt b/requirements_all.txt
index e0c8315f0ef..9934dbd4974 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -769,7 +769,7 @@ sharp_aquos_rc==0.3.2
 simplisafe-python==1.0.2
 
 # homeassistant.components.notify.slack
-slacker==0.9.42
+slacker==0.9.50
 
 # homeassistant.components.notify.xmpp
 sleekxmpp==1.3.2