diff --git a/DrawerController/DrawerController.swift b/DrawerController/DrawerController.swift
index ad21e40..97d6969 100644
--- a/DrawerController/DrawerController.swift
+++ b/DrawerController/DrawerController.swift
@@ -115,6 +115,9 @@ open class DrawerController: UIViewController, UIGestureRecognizerDelegate {
         didSet { fadeView.backgroundColor = fadeColor }
     }
     
+    @IBInspectable
+    public var isEnableAutoSwitchDirection: Bool = false
+    
     @IBInspectable
     public var animationDuration: TimeInterval = 0.35
 
@@ -917,6 +920,17 @@ open class DrawerController: UIViewController, UIGestureRecognizerDelegate {
                     return percentage
                 }
                 
+                guard ss.isEnableAutoSwitchDirection else {
+                    switch from {
+                    case .left:
+                        guard percentage > 0.0 else { return 0.0 }
+                    case .right:
+                        guard percentage < 0.0 else { return 0.0 }
+                    default:
+                        return percentage
+                    }
+                    return percentage
+                }
                 guard ss.contentMap[to] != nil else {
                     return 0.0
                 }
diff --git a/KWDrawerController.podspec b/KWDrawerController.podspec
index 2c6447f..5a22515 100644
--- a/KWDrawerController.podspec
+++ b/KWDrawerController.podspec
@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
 
   s.name              = 'KWDrawerController'
-  s.version           = '4.0'
+  s.version           = '4.1'
   s.summary           = 'Drawer view controller that easy to use!'
   s.license           = { :type => 'MIT', :file => 'LICENSE' }
   s.homepage          = 'https://github.com/kawoou/KWDrawerController'
diff --git a/README.md b/README.md
index 03af539..2e587ae 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,7 @@ KWDrawerController is available on [CocoaPods](https://github.com/cocoapods/coco
 pod 'KWDrawerController', '~> 3.7'
 
 // Swift 4
-pod 'KWDrawerController', '~> 4.0'
+pod 'KWDrawerController', '~> 4.1'
 ```
 
 
@@ -236,6 +236,7 @@ Changelog
 + 3.6.1 Fixed layout issue when rotate device.
 + 3.7 Fixed not updating issues on properties.
 + 4.0 Support Swift 4.
++ 4.1 Implement new flag that enables direction auto-switching.
 
 ⚠️ Requirements
 --------------