diff --git a/libp2p/network/notifee_interface.py b/libp2p/network/notifee_interface.py
index 4ce9ed5..837ecd1 100644
--- a/libp2p/network/notifee_interface.py
+++ b/libp2p/network/notifee_interface.py
@@ -1,44 +1,45 @@
+import asyncio
 from abc import ABC, abstractmethod
 
 class INotifee(ABC):
 
     @abstractmethod
-    def opened_stream(self, network, stream):
+    async def opened_stream(self, network, stream):
         """
         :param network: network the stream was opened on
         :param stream: stream that was opened
         """
 
     @abstractmethod
-    def closed_stream(self, network, stream):
+    async def closed_stream(self, network, stream):
         """
         :param network: network the stream was closed on
         :param stream: stream that was closed
         """
 
     @abstractmethod
-    def connected(self, network, conn):
+    async def connected(self, network, conn):
         """
         :param network: network the connection was opened on
         :param conn: connection that was opened
         """
 
     @abstractmethod
-    def disconnected(self, network, conn):
+    async def disconnected(self, network, conn):
         """
         :param network: network the connection was closed on
         :param conn: connection that was closed
         """
 
     @abstractmethod
-    def listen(self, network, multiaddr):
+    async def listen(self, network, multiaddr):
         """
         :param network: network the listener is listening on
         :param multiaddr: multiaddress listener is listening on
         """
 
     @abstractmethod
-    def listen_close(self, network, multiaddr):
+    async def listen_close(self, network, multiaddr):
         """
         :param network: network the connection was opened on
         :param multiaddr: multiaddress listener is no longer listening on
diff --git a/libp2p/network/swarm.py b/libp2p/network/swarm.py
index 1ecc0df..e6bf288 100644
--- a/libp2p/network/swarm.py
+++ b/libp2p/network/swarm.py
@@ -76,7 +76,7 @@ class Swarm(INetwork):
 
             # Call notifiers since event occurred
             for notifee in self.notifees:
-                notifee.connected(self, muxed_conn)
+                await notifee.connected(self, muxed_conn)
 
         return muxed_conn
 
@@ -110,7 +110,7 @@ class Swarm(INetwork):
 
         # Call notifiers since event occurred
         for notifee in self.notifees:
-            notifee.opened_stream(self, net_stream)
+            await notifee.opened_stream(self, net_stream)
 
         return net_stream
 
@@ -151,7 +151,7 @@ class Swarm(INetwork):
 
                 # Call notifiers since event occurred
                 for notifee in self.notifees:
-                    notifee.connected(self, muxed_conn)
+                    await notifee.connected(self, muxed_conn)
 
             try:
                 # Success
@@ -161,7 +161,7 @@ class Swarm(INetwork):
 
                 # Call notifiers since event occurred
                 for notifee in self.notifees:
-                    notifee.listen(self, multiaddr)
+                    await notifee.listen(self, multiaddr)
 
                 return True
             except IOError:
diff --git a/tests/libp2p/test_notify.py b/tests/libp2p/test_notify.py
index 1df267c..05b2c4f 100644
--- a/tests/libp2p/test_notify.py
+++ b/tests/libp2p/test_notify.py
@@ -28,23 +28,23 @@ class MyNotifee(INotifee):
         self.events = events
         self.val_to_append_to_event = val_to_append_to_event
 
-    def opened_stream(self, network, stream):
+    async def opened_stream(self, network, stream):
         self.events.append(["opened_stream" + \
             self.val_to_append_to_event, stream])
 
-    def closed_stream(self, network, stream):
+    async def closed_stream(self, network, stream):
         pass
 
-    def connected(self, network, conn):
+    async def connected(self, network, conn):
         self.events.append("connected" + self.val_to_append_to_event)
 
-    def disconnected(self, network, conn):
+    async def disconnected(self, network, conn):
         pass
 
-    def listen(self, network, multiaddr):
+    async def listen(self, network, multiaddr):
         pass
 
-    def listen_close(self, network, multiaddr):
+    async def listen_close(self, network, multiaddr):
         pass
 
 @pytest.mark.asyncio