diff --git a/lib/swift/Sources/TSerializable.swift b/lib/swift/Sources/TSerializable.swift
index 1374700..ff976eb 100644
--- a/lib/swift/Sources/TSerializable.swift
+++ b/lib/swift/Sources/TSerializable.swift
@@ -61,11 +61,11 @@
   public static var thriftType: TType { return .i8 }
 
   public static func read(from proto: TProtocol) throws -> Int8 {
-    return Int8(try proto.read() as UInt8)
+    return try proto.read() as Int8
   }
 
   public func write(to proto: TProtocol) throws {
-    try proto.write(UInt8(self))
+    try proto.write(Int8(self))
   }
 }
 
@@ -129,3 +129,15 @@
     try proto.write(self)
   }
 }
+
+extension UUID : TSerializable {
+  public static var thriftType: TType { .uuid }
+  
+  public static func read(from proto: TProtocol) throws -> UUID {
+    return try proto.read()
+  }
+  
+  public func write(to proto: TProtocol) throws {
+    try proto.write(self)
+  }
+}