diff --git a/app/build.gradle b/app/build.gradle
index ac69636d..11eafee2 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,7 +1,7 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 22
+    compileSdkVersion 21
     buildToolsVersion "21.1.2"
 
     defaultConfig {