diff --git a/Sources/Socket.swift b/Sources/Socket.swift
index f264d21..f49635b 100644
--- a/Sources/Socket.swift
+++ b/Sources/Socket.swift
@@ -35,8 +35,8 @@ public typealias Byte = UInt8
 open class Socket {
   
     public let address: String
-    public var port: Int32
-    public var fd: Int32?
+    internal(set) public var port: Int32
+    internal(set) public var fd: Int32?
   
     public init(address: String, port: Int32) {
         self.address = address