diff --git a/build.gradle b/build.gradle
index 1f9b0b7..562efd3 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,21 +1,24 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
-
 buildscript {
-	repositories {
-		jcenter()
-		google()
-	}
-	dependencies {
-		classpath 'com.android.tools.build:gradle:3.4.2'
-		classpath 'com.google.gms:google-services:4.3.4'
-		// NOTE: Do not place your application dependencies here; they belong
-		// in the individual module build.gradle files
-	}
+    repositories {
+        google()
+        jcenter()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:3.4.2'
+        classpath 'com.google.gms:google-services:4.3.4'
+        // NOTE: Do not place your application dependencies here; they belong
+        // in the individual module build.gradle files
+    }
 }
 
 allprojects {
-	repositories {
-		jcenter()
-		google()
-	}
+    repositories {
+        google()
+        jcenter()
+    }
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
 }