title: material-dialogs library:Failed to find: com.android.support:appcompat-v7:21.0.3
body: <p>I am going to add <a href="https://github.com/afollestad/material-dialogs" rel="nofollow"><code>material-dialogs</code></a> library to my project but I get this error <code>Error:Failed to find: com.android.support:appcompat-v7:21.0.3</code> This is <code>build.gradle</code>..Where is my mistake?Is sth wrong with my project?</p>
  
  <pre><code>apply plugin: 'com.android.application'
  
  android {
  compileSdkVersion 21
  buildToolsVersion "21.1.1"
  
  defaultConfig {
      applicationId "com.peomtime.tosca.peomtime"
      minSdkVersion 15
      targetSdkVersion 21
      versionCode 1
      versionName "1.0"
  }
  buildTypes {
      release {
          minifyEnabled false
          proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
      }
  }
  }
  
  dependencies {
  compile fileTree(dir: 'libs', include: ['*.jar'])
  
  compile 'com.android.support:support-v4:21.0.2'
  compile 'com.android.support:appcompat-v7:21.0.+'
  compile 'de.hdodenhof:circleimageview:1.2.0'
  compile 'com.readystatesoftware.systembartint:systembartint:1.0.3'
  //Core
  compile 'com.github.gabrielemariotti.cards:cardslib-core:2.0.1'
  compile 'com.github.machinarius:preferencefragment:0.1.1'
  
  //compile 'com.github.nirhart:parallaxscroll:1.0'
  compile project(':Parallax')
  
  compile 'com.nostra13.universalimageloader:universal-image-loader:1.9.3'
  
  compile 'com.afollestad:material-dialogs:0.6.3.1'
  }
  </code></pre>
  
  <p>thank you so much for your help</p>