diff --git a/Kommander.xcodeproj/project.pbxproj b/Kommander.xcodeproj/project.pbxproj
index 8ced8b9..a54d702 100644
--- a/Kommander.xcodeproj/project.pbxproj
+++ b/Kommander.xcodeproj/project.pbxproj
@@ -349,7 +349,7 @@
 				DEFINES_MODULE = YES;
 				DEVELOPMENT_TEAM = 3VW789WSMP;
 				DYLIB_COMPATIBILITY_VERSION = 0.2.0;
-				DYLIB_CURRENT_VERSION = 0.2.2;
+				DYLIB_CURRENT_VERSION = 0.2.3;
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
 				INFOPLIST_FILE = Kommander/Info.plist;
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
@@ -370,7 +370,7 @@
 				DEFINES_MODULE = YES;
 				DEVELOPMENT_TEAM = 3VW789WSMP;
 				DYLIB_COMPATIBILITY_VERSION = 0.2.0;
-				DYLIB_CURRENT_VERSION = 0.2.2;
+				DYLIB_CURRENT_VERSION = 0.2.3;
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
 				INFOPLIST_FILE = Kommander/Info.plist;
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
diff --git a/Kommander/Info.plist b/Kommander/Info.plist
index 30854b5..0865cde 100644
--- a/Kommander/Info.plist
+++ b/Kommander/Info.plist
@@ -15,7 +15,7 @@
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
-	<string>0.2.2</string>
+	<string>0.2.3</string>
 	<key>CFBundleVersion</key>
 	<string>$(CURRENT_PROJECT_VERSION)</string>
 	<key>NSPrincipalClass</key>
diff --git a/Kommander/Kommand.swift b/Kommander/Kommand.swift
index 0e7f732..a22248e 100644
--- a/Kommander/Kommand.swift
+++ b/Kommander/Kommand.swift
@@ -10,9 +10,9 @@ import Foundation
 
 open class Kommand<T> {
 
-    public typealias ActionBlock = () throws -> T
-    public typealias SuccessBlock = (_ result: T) -> Void
-    public typealias ErrorBlock = (_ error: Error) -> Void
+    public typealias ActionBlock = () throws -> T?
+    public typealias SuccessBlock = (_ result: T?) -> Void
+    public typealias ErrorBlock = (_ error: Error?) -> Void
 
     private final let deliverer: Dispatcher
     private final let executor: Dispatcher
@@ -37,7 +37,7 @@ open class Kommand<T> {
         return self
     }
 
-    open func execute() {
+    open func execute() -> Self {
         action = executor.execute {
             do {
                 let result = try self.actionBlock()
@@ -50,6 +50,7 @@ open class Kommand<T> {
                 }
             }
         }
+        return self
     }
 
     open func cancel() {
diff --git a/Kommander/Kommander.swift b/Kommander/Kommander.swift
index 8308b94..901bf45 100644
--- a/Kommander/Kommander.swift
+++ b/Kommander/Kommander.swift
@@ -48,11 +48,11 @@ open class Kommander {
         executor = Dispatcher(label: name, qos: qos, attributes: attributes, autoreleaseFrequency: autoreleaseFrequency, target: target)
     }
 
-    open func makeKommand<T>(_ actionBlock: @escaping () throws -> T) -> Kommand<T> {
+    open func makeKommand<T>(_ actionBlock: @escaping () throws -> T?) -> Kommand<T> {
         return Kommand<T>(deliverer: deliverer, executor: executor, actionBlock: actionBlock)
     }
 
-    open func makeKommands<T>(_ actionBlocks: [() throws -> T]) -> [Kommand<T>] {
+    open func makeKommands<T>(_ actionBlocks: [() throws -> T?]) -> [Kommand<T>] {
         var kommands = [Kommand<T>]()
         for actionBlock in actionBlocks {
             kommands.append(Kommand<T>(deliverer: deliverer, executor: executor, actionBlock: actionBlock))
diff --git a/README.md b/README.md
index 53f6d83..bc29715 100644
--- a/README.md
+++ b/README.md
@@ -6,8 +6,12 @@
 [![Platform](https://img.shields.io/cocoapods/p/Kommander.svg?style=flat)](http://cocoapods.org/pods/Kommander)
 [![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/Carthage/Carthage)
 
+
 **Kommander** is a Swift library to manage the task execution in different threads. Through the definition a simple but powerful concept, [**Kommand**](https://en.wikipedia.org/wiki/Command_pattern).
 
+Inspired on the Java library [**Kommander**](https://github.com/Wokdsem/Kommander) from [**Wokdsem**](https://github.com/Wokdsem).
+
+
 ![Kommander](https://raw.githubusercontent.com/intelygenz/Kommander-iOS/master/Kommander.png)
 
 ## Features
@@ -17,8 +21,8 @@
 - [x] Cancel kommand or multiple kommands
 - [x] Set kommand success block
 - [x] Set kommand error block
-- [x] Main threat dispatcher
-- [x] Current threat dispatcher
+- [x] Main thread dispatcher
+- [x] Current thread dispatcher
 - [x] Custom OperationQueue dispatcher
 - [x] Custom DispatchQueue dispatcher
 - [x] Execute single or multiple Operation
@@ -39,13 +43,13 @@ pod 'Kommander'
 For Swift 2 compatibility use:
 
 ```ruby
-pod 'Kommander', :git => 'https://github.com/intelygenz/Kommander-iOS.git', :tag => '0.2.2-swift2'
+pod 'Kommander', :git => 'https://github.com/intelygenz/Kommander-iOS.git', :tag => '0.2.3-swift2'
 ```
 
 For Objective-C compatibility use:
 
 ```ruby
-pod 'Kommander', :git => 'https://github.com/intelygenz/Kommander-iOS.git', :tag => '0.2.2-objc'
+pod 'Kommander', :git => 'https://github.com/intelygenz/Kommander-iOS.git', :tag => '0.2.3-objc'
 ```
 
 #### Or you can install it with [Carthage](https://github.com/Carthage/Carthage):
@@ -77,12 +81,12 @@ Kommander().makeKommand { () -> Void in
 
 ## Authors
 
-'Juan Trías' => 'juan.trias@intelygenz.com', 'Roberto Estrada' => 'roberto.estrada@intelygenz.com'
-
 [alexruperez](https://github.com/alexruperez), alejandro.ruperez@intelygenz.com
+
 [juantrias](https://github.com/juantrias), juan.trias@intelygenz.com
-[RobertoEstrada](https://github.com/RobertoEstrada), roberto.estrada@intelygenz.com'
+
+[RobertoEstrada](https://github.com/RobertoEstrada), roberto.estrada@intelygenz.com
 
 ## License
 
-Kommander is available under the MIT license. See the LICENSE file for more info.
+Kommander is available under the MIT license. See the LICENSE file for more info.
\ No newline at end of file