diff --git a/DLRadioButton.podspec.json b/DLRadioButton.podspec.json
index 18eaf72..ba4e7af 100644
--- a/DLRadioButton.podspec.json
+++ b/DLRadioButton.podspec.json
@@ -1,6 +1,6 @@
 {
 	"name": "DLRadioButton",
-	"version": "1.3.0",
+	"version": "1.3.1",
 	"summary": "A highly customizable Radio Button for iOS",
 	"description": "A highly customizable Radio Button for iOS.\n\n* Buttons are drew by UIBezierPath, customize it however you want.\n* You can also use pictures to indicate buttons' selection state.\n",
 	"homepage": "https://github.com/DavydLiu/DLRadioButton",
@@ -17,7 +17,7 @@
 	},
 	"source": {
 		"git": "https://github.com/DavydLiu/DLRadioButton.git",
-		"tag": "1.3.0"
+		"tag": "1.3.1"
 	},
 	"source_files": "DLRadioButton/**/*.{h,m}",
 	"exclude_files": "Classes/Exclude",
diff --git a/DLRadioButtonExample/DLRadioButtonExample/DLRadioButtonExample-Info.plist b/DLRadioButtonExample/DLRadioButtonExample/DLRadioButtonExample-Info.plist
index e7cb884..4f98614 100644
--- a/DLRadioButtonExample/DLRadioButtonExample/DLRadioButtonExample-Info.plist
+++ b/DLRadioButtonExample/DLRadioButtonExample/DLRadioButtonExample-Info.plist
@@ -9,7 +9,7 @@
 	<key>CFBundleExecutable</key>
 	<string>${EXECUTABLE_NAME}</string>
 	<key>CFBundleIdentifier</key>
-	<string>com.liuxingruo.${PRODUCT_NAME}</string>
+	<string>com.liuxingruo.$(PRODUCT_NAME)</string>
 	<key>CFBundleInfoDictionaryVersion</key>
 	<string>6.0</string>
 	<key>CFBundleName</key>
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..8c2b4c3
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,19 @@
+Copyright (c) 2014 Xingruo Liu
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/README.md b/README.md
index b5e32af..2c57c2d 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,9 @@
 
 ## Usage
 
+####To install:
+*	Put `DLRadioButton.h` and `DLRadiobutton.m` in your project, or add `Pod DLRadioButton` to your Podfile.
+
 ####To add radio buttons in interface builder:
 
 1.  Put some UIButtons onto a View and change the UIButtons' type to "custom".
@@ -38,14 +41,7 @@
 
 ## Requirements
 
-ARC
-
-## 
-
-DLRadioButton is available through [CocoaPods](http://cocoapods.org). To install
-it, simply add the following line to your Podfile:
-
-    pod "DLRadioButton"
+ARC, iOS 6.0
 
 ## Author