diff --git a/homeassistant/components/notify/slack.py b/homeassistant/components/notify/slack.py
index aba02c020b9..49b6f8acc93 100644
--- a/homeassistant/components/notify/slack.py
+++ b/homeassistant/components/notify/slack.py
@@ -10,7 +10,7 @@ from homeassistant.components.notify import DOMAIN, BaseNotificationService
 from homeassistant.const import CONF_API_KEY
 from homeassistant.helpers import validate_config
 
-REQUIREMENTS = ['slacker==0.9.10']
+REQUIREMENTS = ['slacker==0.9.16']
 _LOGGER = logging.getLogger(__name__)
 
 
diff --git a/requirements_all.txt b/requirements_all.txt
index 6decd570696..58e1503904b 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -331,7 +331,7 @@ scsgate==0.1.0
 sendgrid>=1.6.0,<1.7.0
 
 # homeassistant.components.notify.slack
-slacker==0.9.10
+slacker==0.9.16
 
 # homeassistant.components.notify.xmpp
 sleekxmpp==1.3.1