diff --git a/app/build.gradle b/app/build.gradle
index ff4a2f6..2595970 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -2,13 +2,13 @@ apply plugin: 'com.android.application'
 apply plugin: 'witness'
 
 android {
-    compileSdkVersion 21
-    buildToolsVersion '21.1.2'
+    compileSdkVersion 22
+    buildToolsVersion '22.0.1'
     defaultConfig {
         versionCode 11
         versionName '0.5'
         minSdkVersion 9
-        targetSdkVersion 21
+        targetSdkVersion 22
 
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
     }
diff --git a/build.gradle b/build.gradle
index b3d7508..352a566 100644
--- a/build.gradle
+++ b/build.gradle
@@ -3,7 +3,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:1.0.0'
+        classpath 'com.android.tools.build:gradle:1.2.3'
         classpath files('gradle/libs/gradle-witness.jar')
     }
 }