How to change build tools version in Android Studio

I have a problem using jfeinstein10 Sliding Menu

I added the library into my root project folder. But I get this error :

Error:The SDK Build Tools revision (17.0.0) is too low for project ':SlidingMenu'. Minimum required is 19.1.0

But I'm already using "19.1.0" but it still says I'm using 17.0.0

Here is my build.gradle

apply plugin: 'com.android.application'

android {
    compileSdkVersion 22
    buildToolsVersion "19.1.0"

    defaultConfig {
        applicationId "com.repliklernet.replikler"
        minSdkVersion 14
        targetSdkVersion 22
        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:appcompat-v7:22.2.1'
    compile group:'com.squareup.picasso', name:'picasso', version:'2.5.0'
    compile project(':SlidingMenu')
}

What am I missing ?