diff --git a/GCXMulticastDNSKit/Discovery.swift b/GCXMulticastDNSKit/Discovery.swift
index f3ad691..b1f42a2 100644
--- a/GCXMulticastDNSKit/Discovery.swift
+++ b/GCXMulticastDNSKit/Discovery.swift
@@ -59,7 +59,7 @@ private class DiscoveryItem {
 
 
 /// a structure to enapsulate the result of a service discovery, this is returned
-@objc(GCXDiscoveryService) public class DiscoveryService: NSObject {
+@objc(GCXDiscoveryService) open class DiscoveryService: NSObject {
     
     /// the configuration used to search
     public let configuration: DiscoveryConfiguration
@@ -67,7 +67,7 @@ private class DiscoveryItem {
     /// the found service
     public let netService: NetService
     
-    init(configuration: DiscoveryConfiguration, netService: NetService) {
+    public init(configuration: DiscoveryConfiguration, netService: NetService) {
         self.configuration = configuration
         self.netService  = netService
         super.init()
@@ -120,7 +120,7 @@ private class DiscoveryItem {
 
 /// the class to use to discover service on the network. Initialize a new instance with an array of
 /// configurations and start the search.
-@objc(GCXDiscovery) public class Discovery: NSObject {
+@objc(GCXDiscovery) open class Discovery: NSObject {
 
     
     /// the default search domain, empty string means .local. 
@@ -141,9 +141,9 @@ private class DiscoveryItem {
     
     
     /// the completion closures
-    fileprivate var discoverHandler: DiscoveryDiscoverHandler?
-    fileprivate var failHandler: DiscoveryFailHandler?
-    fileprivate var serviceRemovedHandler: DiscoveryServiceRemovedHandler?
+    public var discoverHandler: DiscoveryDiscoverHandler?
+    public var failHandler: DiscoveryFailHandler?
+    public var serviceRemovedHandler: DiscoveryServiceRemovedHandler?
     
     /// the designated initializer. creates a new discovery for the specified configurations
     ///
diff --git a/GCXMulticastDNSKit/DiscoveryConfiguration.swift b/GCXMulticastDNSKit/DiscoveryConfiguration.swift
index 691b70e..63cfbe1 100644
--- a/GCXMulticastDNSKit/DiscoveryConfiguration.swift
+++ b/GCXMulticastDNSKit/DiscoveryConfiguration.swift
@@ -18,7 +18,7 @@
 
 import Foundation
 
-@objc(GCXDiscoveryConfiguration) public class DiscoveryConfiguration: NSObject {
+@objc(GCXDiscoveryConfiguration) open class DiscoveryConfiguration: NSObject {
     public let serviceType: String
     public var serviceNamePrefix: String?