diff --git a/KLCircleViewControllerDemo/en.lproj/MainStoryboard.storyboard b/KLCircleViewControllerDemo/en.lproj/MainStoryboard.storyboard
index a6a548c..7314fa8 100644
--- a/KLCircleViewControllerDemo/en.lproj/MainStoryboard.storyboard
+++ b/KLCircleViewControllerDemo/en.lproj/MainStoryboard.storyboard
@@ -1,7 +1,9 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="2.0" toolsVersion="3084" systemVersion="12E55" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" initialViewController="2">
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="2.0" toolsVersion="4488.1" systemVersion="12E55" targetRuntime="iOS.CocoaTouch" variant="6xAndEarlier" propertyAccessControl="none" useAutolayout="YES" initialViewController="2">
     <dependencies>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="2083"/>
+        <deployment defaultVersion="1552" identifier="iOS"/>
+        <development version="4600" identifier="xcode"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="3715.3"/>
     </dependencies>
     <scenes>
         <!--View Controller-->
@@ -13,12 +15,13 @@
                         <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
                         <subviews>
                             <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="dKx-iy-uc2">
+                                <rect key="frame" x="45" y="448" width="73" height="44"/>
                                 <constraints>
                                     <constraint firstAttribute="width" constant="73" id="7jH-3c-h0t"/>
                                 </constraints>
                                 <fontDescription key="fontDescription" type="boldSystem" pointSize="15"/>
                                 <state key="normal" title="Left">
-                                    <color key="titleColor" red="0.19607843459999999" green="0.30980393290000002" blue="0.52156865600000002" alpha="1" colorSpace="calibratedRGB"/>
+                                    <color key="titleColor" red="0.19607843137254902" green="0.30980392156862746" blue="0.52156862745098043" alpha="1" colorSpace="calibratedRGB"/>
                                     <color key="titleShadowColor" white="0.5" alpha="1" colorSpace="calibratedWhite"/>
                                 </state>
                                 <state key="highlighted">
@@ -29,12 +32,13 @@
                                 </connections>
                             </button>
                             <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="3ym-88-OmC">
+                                <rect key="frame" x="126" y="448" width="73" height="44"/>
                                 <constraints>
                                     <constraint firstAttribute="width" constant="73" id="9TC-EO-JxP"/>
                                 </constraints>
                                 <fontDescription key="fontDescription" type="boldSystem" pointSize="15"/>
                                 <state key="normal" title="Center">
-                                    <color key="titleColor" red="0.19607843459999999" green="0.30980393290000002" blue="0.52156865600000002" alpha="1" colorSpace="calibratedRGB"/>
+                                    <color key="titleColor" red="0.19607843137254902" green="0.30980392156862746" blue="0.52156862745098043" alpha="1" colorSpace="calibratedRGB"/>
                                     <color key="titleShadowColor" white="0.5" alpha="1" colorSpace="calibratedWhite"/>
                                 </state>
                                 <state key="highlighted">
@@ -45,12 +49,13 @@
                                 </connections>
                             </button>
                             <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="9Zv-fa-FGg">
+                                <rect key="frame" x="203" y="448" width="73" height="44"/>
                                 <constraints>
                                     <constraint firstAttribute="width" constant="73" id="jdU-uC-AAd"/>
                                 </constraints>
                                 <fontDescription key="fontDescription" type="boldSystem" pointSize="15"/>
                                 <state key="normal" title="Right">
-                                    <color key="titleColor" red="0.19607843459999999" green="0.30980393290000002" blue="0.52156865600000002" alpha="1" colorSpace="calibratedRGB"/>
+                                    <color key="titleColor" red="0.19607843137254902" green="0.30980392156862746" blue="0.52156862745098043" alpha="1" colorSpace="calibratedRGB"/>
                                     <color key="titleShadowColor" white="0.5" alpha="1" colorSpace="calibratedWhite"/>
                                 </state>
                                 <state key="highlighted">
@@ -61,9 +66,10 @@
                                 </connections>
                             </button>
                             <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="C7F-kG-GnX">
+                                <rect key="frame" x="126" y="499" width="73" height="44"/>
                                 <fontDescription key="fontDescription" type="boldSystem" pointSize="15"/>
                                 <state key="normal" title="Down">
-                                    <color key="titleColor" red="0.19607843459999999" green="0.30980393290000002" blue="0.52156865600000002" alpha="1" colorSpace="calibratedRGB"/>
+                                    <color key="titleColor" red="0.19607843137254902" green="0.30980392156862746" blue="0.52156862745098043" alpha="1" colorSpace="calibratedRGB"/>
                                     <color key="titleShadowColor" white="0.5" alpha="1" colorSpace="calibratedWhite"/>
                                 </state>
                                 <state key="highlighted">
@@ -97,24 +103,6 @@
             </objects>
         </scene>
     </scenes>
-    <classes>
-        <class className="KLViewController" superclassName="UIViewController">
-            <source key="sourceIdentifier" type="project" relativePath="./Classes/KLViewController.h"/>
-            <relationships>
-                <relationship kind="action" name="didPressCenter:"/>
-                <relationship kind="action" name="didPressDownButton:"/>
-                <relationship kind="action" name="didPressLeftButton:"/>
-                <relationship kind="action" name="didPressRightButton:"/>
-                <relationship kind="outlet" name="centerButton" candidateClass="UIButton"/>
-                <relationship kind="outlet" name="downButton" candidateClass="UIButton"/>
-                <relationship kind="outlet" name="leftButton" candidateClass="UIButton"/>
-                <relationship kind="outlet" name="rightButton" candidateClass="UIButton"/>
-            </relationships>
-        </class>
-        <class className="NSLayoutConstraint" superclassName="NSObject">
-            <source key="sourceIdentifier" type="project" relativePath="./Classes/NSLayoutConstraint.h"/>
-        </class>
-    </classes>
     <simulatedMetricsContainer key="defaultSimulatedMetrics">
         <simulatedStatusBarMetrics key="statusBar"/>
         <simulatedOrientationMetrics key="orientation"/>