diff --git a/OpenVPN Adapter/OpenVPNAdapter+Public.h b/OpenVPN Adapter/OpenVPNAdapter+Public.h
index b101e62..188f819 100644
--- a/OpenVPN Adapter/OpenVPNAdapter+Public.h	
+++ b/OpenVPN Adapter/OpenVPNAdapter+Public.h	
@@ -10,14 +10,19 @@
 
 #import "OpenVPNAdapter.h"
 
-@class NEPacketTunnelFlow;
 @class NEPacketTunnelNetworkSettings;
 
+@protocol OpenVPNAdapterPacketFlow <NSObject>
+
+- (void)readPacketsWithCompletionHandler:(nonnull void (^)(NSArray<NSData *>  * _Nonnull packets, NSArray<NSNumber *> * _Nonnull protocols))completionHandler;
+- (BOOL)writePackets:(nonnull NSArray<NSData *> *)packets withProtocols:(nonnull NSArray<NSNumber *> *)protocols;
+
+@end
 
 @protocol OpenVPNAdapterDelegate <NSObject>
 
 - (void)configureTunnelWithSettings:(nonnull NEPacketTunnelNetworkSettings *)settings
-                 callback:(nonnull void (^)(NEPacketTunnelFlow * __nullable flow))callback
+                 callback:(nonnull void (^)(id<OpenVPNAdapterPacketFlow> _Nullable flow))callback
 NS_SWIFT_NAME(configureTunnel(settings:callback:));
 
 - (void)handleEvent:(OpenVPNEvent)event
@@ -29,7 +34,6 @@ NS_SWIFT_NAME(handle(error:));
 
 @end
 
-
 @interface OpenVPNAdapter (Provider)
 
 @property (strong, nonatomic, nullable) NSString *username;
diff --git a/OpenVPN Adapter/OpenVPNAdapter.mm b/OpenVPN Adapter/OpenVPNAdapter.mm
index 129f3a2..a3fd300 100644
--- a/OpenVPN Adapter/OpenVPNAdapter.mm	
+++ b/OpenVPN Adapter/OpenVPNAdapter.mm	
@@ -43,7 +43,7 @@ NSString * const OpenVPNAdapterErrorEventKey = @"me.ss-abramchuk.openvpn-adapter
 @property CFSocketRef vpnSocket;
 @property CFSocketRef tunSocket;
 
-@property (weak, nonatomic) NEPacketTunnelFlow *packetFlow;
+@property (weak, nonatomic) id<OpenVPNAdapterPacketFlow> packetFlow;
 
 - (void)readTUNPackets;
 - (void)readVPNData:(NSData *)data;
@@ -199,7 +199,7 @@ static void socketCallback(CFSocketRef socket, CFSocketCallBackType type, CFData
     
     dispatch_semaphore_t sema = dispatch_semaphore_create(0);
     
-    [self.delegate configureTunnelWithSettings:networkSettings callback:^(NEPacketTunnelFlow * _Nullable flow) {
+    [self.delegate configureTunnelWithSettings:networkSettings callback:^(id<OpenVPNAdapterPacketFlow> _Nullable flow) {
         self.packetFlow = flow;
         dispatch_semaphore_signal(sema);
     }];
diff --git a/OpenVPN Tunnel Provider/NEPacketTunnelFlow+OpenVPN.swift b/OpenVPN Tunnel Provider/NEPacketTunnelFlow+OpenVPN.swift
new file mode 100644
index 0000000..1588f82
--- /dev/null
+++ b/OpenVPN Tunnel Provider/NEPacketTunnelFlow+OpenVPN.swift	
@@ -0,0 +1,13 @@
+//
+//  NEPacketTunnelFlow+OpenVPN.swift
+//  OpenVPN iOS Client
+//
+//  Created by Sergey Abramchuk on 09.03.17.
+//
+//
+
+import Foundation
+import NetworkExtension
+import OpenVPNAdapter
+
+extension NEPacketTunnelFlow: OpenVPNAdapterPacketFlow { }
diff --git a/OpenVPN Tunnel Provider/PacketTunnelProvider.swift b/OpenVPN Tunnel Provider/PacketTunnelProvider.swift
index 7b5c971..cc34c7f 100644
--- a/OpenVPN Tunnel Provider/PacketTunnelProvider.swift	
+++ b/OpenVPN Tunnel Provider/PacketTunnelProvider.swift	
@@ -74,7 +74,7 @@ class PacketTunnelProvider: NEPacketTunnelProvider {
 
 extension PacketTunnelProvider: OpenVPNAdapterDelegate {
     
-    func configureTunnel(settings: NEPacketTunnelNetworkSettings, callback: @escaping (NEPacketTunnelFlow?) -> Void) {
+    func configureTunnel(settings: NEPacketTunnelNetworkSettings, callback: @escaping (OpenVPNAdapterPacketFlow?) -> Void) {
         setTunnelNetworkSettings(settings) { (error) in
             callback(error == nil ? self.packetFlow : nil)
         }
@@ -85,7 +85,7 @@ extension PacketTunnelProvider: OpenVPNAdapterDelegate {
     }
     
     func handle(error: Error) {
-        
+
     }
     
 }