diff --git a/homeassistant/components/sensor/coinmarketcap.py b/homeassistant/components/sensor/coinmarketcap.py
index 9d69583f67..cf3f0796df 100644
--- a/homeassistant/components/sensor/coinmarketcap.py
+++ b/homeassistant/components/sensor/coinmarketcap.py
@@ -16,7 +16,7 @@ from homeassistant.const import (
     ATTR_ATTRIBUTION, CONF_CURRENCY, CONF_DISPLAY_CURRENCY)
 from homeassistant.helpers.entity import Entity
 
-REQUIREMENTS = ['coinmarketcap==4.1.2']
+REQUIREMENTS = ['coinmarketcap==4.2.1']
 
 _LOGGER = logging.getLogger(__name__)
 
diff --git a/requirements_all.txt b/requirements_all.txt
index d49d695772..f94626e867 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -173,7 +173,7 @@ ciscosparkapi==0.4.2
 coinbase==2.0.6
 
 # homeassistant.components.sensor.coinmarketcap
-coinmarketcap==4.1.2
+coinmarketcap==4.2.1
 
 # homeassistant.scripts.check_config
 colorlog==3.1.2
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index 0541ce834f..9bb41e09c2 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -38,7 +38,7 @@ apns2==0.3.0
 caldav==0.5.0
 
 # homeassistant.components.sensor.coinmarketcap
-coinmarketcap==4.1.2
+coinmarketcap==4.2.1
 
 # homeassistant.components.device_tracker.upc_connect
 defusedxml==0.5.0