Bump compileSdkVersion to 23
diff --git a/build.gradle b/build.gradle
index 374771e..4baa8e5 100644
--- a/build.gradle
+++ b/build.gradle
@@ -21,7 +21,7 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 21
+    compileSdkVersion 23
     buildToolsVersion "21.1.2"
 
     defaultConfig {