diff --git a/ACardEmulator/app/build.gradle b/ACardEmulator/app/build.gradle
index bc7a5ab..1063e5d 100644
--- a/ACardEmulator/app/build.gradle
+++ b/ACardEmulator/app/build.gradle
@@ -1,8 +1,8 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 21
-    buildToolsVersion "21.1.2"
+    compileSdkVersion 22
+    buildToolsVersion "22.0.1"
 
     defaultConfig {
         applicationId "com.vsmartcard.acardemulator"