diff --git a/CocoaMQTT.podspec b/CocoaMQTT.podspec
index 8cebd96f..f8965503 100644
--- a/CocoaMQTT.podspec
+++ b/CocoaMQTT.podspec
@@ -13,13 +13,22 @@ Pod::Spec.new do |s|
   s.tvos.deployment_target = "10.0"
   # s.watchos.deployment_target = "2.0"
   s.source   = { :git => "https://github.com/emqx/CocoaMQTT.git", :tag => "1.3.0-rc.1"}
-  s.default_subspec = 'Core'
+  s.default_subspecs = ['Core', 'CocoaAsyncSocket']
   
   s.subspec 'Core' do |ss|
-    ss.dependency "CocoaAsyncSocket", "~> 7.6.3"
     ss.source_files = "Source/*.swift"
     ss.exclude_files = "Source/CocoaMQTTWebSocket.swift"
   end
+
+  s.subspec 'Network' do |ss|
+    ss.dependency "CocoaMQTT/Core"
+    ss.framework = "Network"
+  end
+
+  s.subspec 'CocoaAsyncSocket' do |ss|
+    ss.dependency "CocoaMQTT/Core"
+    ss.dependency "CocoaAsyncSocket", "~> 7.6.3"
+  end
   
   s.subspec 'WebSockets' do |ss|
     ss.dependency "CocoaMQTT/Core"
diff --git a/Example/Podfile b/Example/Podfile
index fa9c4da4..411dc130 100644
--- a/Example/Podfile
+++ b/Example/Podfile
@@ -2,5 +2,7 @@ platform :ios, 10.0
 use_frameworks!
 
 target 'Example' do
+    pod 'CocoaMQTT', :path => '../'
     pod 'CocoaMQTT/WebSockets', :path => '../'
+    pod 'CocoaMQTT/CocoaAsyncSocket', :path => '../'
 end
diff --git a/Source/CocoaMQTT.swift b/Source/CocoaMQTT.swift
index 3f9b2708..4f768335 100644
--- a/Source/CocoaMQTT.swift
+++ b/Source/CocoaMQTT.swift
@@ -163,8 +163,18 @@ public class CocoaMQTT: NSObject, CocoaMQTTClient {
     ///
     /// - Note:
     public var backgroundOnSocket: Bool {
-        get { return (self.socket as? CocoaMQTTSocket)?.backgroundOnSocket ?? true }
-        set { (self.socket as? CocoaMQTTSocket)?.backgroundOnSocket = newValue }
+        get {
+            #if canImport(CocoaAsyncSocket)
+            return (self.socket as? CocoaMQTTSocket)?.backgroundOnSocket ?? true
+            #else
+            return true
+            #endif
+        }
+        set {
+            #if canImport(CocoaAsyncSocket)
+            (self.socket as? CocoaMQTTSocket)?.backgroundOnSocket = newValue
+            #endif
+        }
     }
     
     /// Delegate Executed queue. Default is `DispatchQueue.main`
diff --git a/Source/CocoaMQTTNetworkConnectionSocket.swift b/Source/CocoaMQTTNetworkConnectionSocket.swift
index abf08dac..86a9931c 100644
--- a/Source/CocoaMQTTNetworkConnectionSocket.swift
+++ b/Source/CocoaMQTTNetworkConnectionSocket.swift
@@ -6,6 +6,7 @@
 //  Copyright © 2020 emqx.io. All rights reserved.
 //
 
+#if canImport(Network)
 import Foundation
 import Network
 
@@ -106,4 +107,4 @@ extension CocoaMQTTNetworkConnectionSocket {
         return NWParameters(tls: options)
     }
 }
-
+#endif
diff --git a/Source/CocoaMQTTSocket.swift b/Source/CocoaMQTTSocket.swift
index 5ea0bf76..8e11febf 100644
--- a/Source/CocoaMQTTSocket.swift
+++ b/Source/CocoaMQTTSocket.swift
@@ -6,7 +6,9 @@
 //
 
 import Foundation
+#if canImport(CocoaAsyncSocket)
 import CocoaAsyncSocket
+#endif
 
 // MARK: - Interfaces
 
@@ -30,6 +32,7 @@ public protocol CocoaMQTTSocketProtocol {
     func write(_ data: Data, withTimeout timeout: TimeInterval, tag: Int)
 }
 
+#if canImport(CocoaAsyncSocket)
 // MARK: - CocoaMQTTSocket
 
 public class CocoaMQTTSocket: NSObject {
@@ -133,3 +136,6 @@ extension CocoaMQTTSocket: GCDAsyncSocketDelegate {
         delegate?.socketDidDisconnect(self, withError: err)
     }
 }
+#elseif canImport(Network)
+public typealias CocoaMQTTSocket = CocoaMQTTNetworkConnectionSocket
+#endif