diff --git a/homeassistant/components/binary_sensor/workday.py b/homeassistant/components/binary_sensor/workday.py
index 58599d3d3de..f5a7324d351 100644
--- a/homeassistant/components/binary_sensor/workday.py
+++ b/homeassistant/components/binary_sensor/workday.py
@@ -17,7 +17,7 @@ import homeassistant.helpers.config_validation as cv
 
 _LOGGER = logging.getLogger(__name__)
 
-REQUIREMENTS = ['holidays==0.9.3']
+REQUIREMENTS = ['holidays==0.9.4']
 
 # List of all countries currently supported by holidays
 # There seems to be no way to get the list out at runtime
diff --git a/requirements_all.txt b/requirements_all.txt
index 0ce8465df6d..c4c640b063a 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -350,7 +350,7 @@ hikvision==0.4
 hipnotify==1.0.8
 
 # homeassistant.components.binary_sensor.workday
-holidays==0.9.3
+holidays==0.9.4
 
 # homeassistant.components.frontend
 home-assistant-frontend==20180310.0
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index 2f4768fd90b..dc0ca164ab2 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -75,7 +75,7 @@ haversine==0.4.5
 hbmqtt==0.9.1
 
 # homeassistant.components.binary_sensor.workday
-holidays==0.9.3
+holidays==0.9.4
 
 # homeassistant.components.frontend
 home-assistant-frontend==20180310.0