diff --git a/app/build.gradle b/app/build.gradle
index e5c13ec..729c154 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -2,7 +2,7 @@ apply plugin: 'com.android.application'
 
 android {
     compileSdkVersion 22
-    buildToolsVersion "20.0.1"
+    buildToolsVersion "22.0.1"
 
     defaultConfig {
         applicationId "io.codetail.circualrevealsample"
@@ -11,12 +11,6 @@ android {
         versionCode 1
         versionName "1.0"
     }
-    buildTypes {
-        release {
-            minifyEnabled false
-            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
-        }
-    }
 
     lintOptions{
         abortOnError false
@@ -27,9 +21,9 @@ dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
     compile project(':circualreveal')
 
-    compile 'com.android.support:appcompat-v7:22.0.0'
-    compile 'com.android.support:cardview-v7:22.0.0'
-    compile 'com.android.support:recyclerview-v7:22.0.0'
+    compile 'com.android.support:appcompat-v7:22.1.0'
+    compile 'com.android.support:recyclerview-v7:22.1.0'
+    compile 'com.android.support:cardview-v7:22.1.0'
 
     compile 'com.jakewharton:butterknife:6.0.0'
 }