diff --git a/apns2/client.py b/apns2/client.py
index fbd99da..8f8632f 100644
--- a/apns2/client.py
+++ b/apns2/client.py
@@ -21,10 +21,12 @@ class APNsClient(object):
         ssl_context.load_cert_chain(cert_file)
         self.__connection = HTTP20Connection(server, port, ssl_context=ssl_context)
 
-    def send_notification(self, token_hex, notification, topic=None):
+    def send_notification(self, token_hex, notification, prioriy=NotificationPriority.Immediate, topic=None):
         json_payload = dumps(notification.dict(), ensure_ascii=False, separators=(',',':')).encode('utf-8')
-        headers = {}
 
+        headers = {
+            'apns-priority': prioriy.value
+        }
         if topic:
             headers['apns-topic'] = topic
 
diff --git a/apns2/client.pyi b/apns2/client.pyi
index 13c706a..c5e4c5d 100644
--- a/apns2/client.pyi
+++ b/apns2/client.pyi
@@ -1,5 +1,6 @@
 from typing import Optional
 
+from apns2.client import NotificationPriority
 from apns2.payload import Payload
 
 
@@ -10,6 +11,7 @@ class APNsClient(object):
                  use_alternate_port: bool = False) -> None: ...
 
     def send_notification(self,
-             token_hex: str,
-             notification: Payload,
-             topic: Optional[str] = None) -> None: ...
+                          token_hex: str,
+                          notification: Payload,
+                          prioriy: NotificationPriority = NotificationPriority.Immediate,
+                          topic: Optional[str] = None) -> None: ...