diff --git a/homeassistant/components/sensor/worxlandroid.py b/homeassistant/components/sensor/worxlandroid.py
index c49ce36bd49..8963bb135e0 100644
--- a/homeassistant/components/sensor/worxlandroid.py
+++ b/homeassistant/components/sensor/worxlandroid.py
@@ -28,7 +28,7 @@ DEFAULT_TIMEOUT = 5
 PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
     vol.Required(CONF_HOST): cv.string,
     vol.Required(CONF_PIN):
-        vol.All(vol.Coerce(int), vol.Range(min=1000, max=9999)),
+        vol.All(vol.Coerce(str), vol.Match(r'\d{4}')),
     vol.Optional(CONF_ALLOW_UNREACHABLE, default=True): cv.boolean,
     vol.Optional(CONF_TIMEOUT, default=DEFAULT_TIMEOUT): cv.positive_int,
 })