diff --git a/app/build.gradle b/app/build.gradle
index f78d9a7..f141ba4 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -3,7 +3,7 @@ apply plugin: 'witness'
 
 android {
     compileSdkVersion 21
-    buildToolsVersion '21.0.2'
+    buildToolsVersion '21.1.1'
     defaultConfig {
         versionCode 9
         versionName '0.3'