diff --git a/homeassistant/components/notify/pushover.py b/homeassistant/components/notify/pushover.py
index bd7542c21cd..04aa7627963 100644
--- a/homeassistant/components/notify/pushover.py
+++ b/homeassistant/components/notify/pushover.py
@@ -63,6 +63,9 @@ class PushoverNotificationService(BaseNotificationService):
 
         targets = kwargs.get(ATTR_TARGET)
 
+        if not isinstance(targets, list):
+            targets = [targets]
+
         for target in targets:
             if target is not None:
                 data['device'] = target