diff --git a/build.gradle b/build.gradle
index e4b1efa..c53b40f 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,6 +1,6 @@
 buildscript {
     repositories {
-        jcenter()
+        mavenCentral()
         google()
     }
     dependencies {
@@ -10,7 +10,7 @@ buildscript {
 
 allprojects {
     repositories {
-        jcenter()
+        mavenCentral()
         maven { url "https://jitpack.io" }
         google()
     }
diff --git a/sample/src/main/AndroidManifest.xml b/sample/src/main/AndroidManifest.xml
index 396192d..8404c51 100644
--- a/sample/src/main/AndroidManifest.xml
+++ b/sample/src/main/AndroidManifest.xml
@@ -1,12 +1,14 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
     package="com.dd.morphingbutton.sample">
 
     <application
         android:allowBackup="true"
         android:icon="@drawable/ic_launcher"
         android:label="@string/app_name"
-        android:theme="@style/AppTheme">
+        android:theme="@style/AppTheme"
+        tools:ignore="AllowBackup">
         <activity
             android:name=".MainActivity"
             android:exported="true"