Error with srcCompat

I am getting the following error when trying to run the Interactive Story app:

Error:(11) No resource identifier found for attribute 'srcCompat' in package 'com.hylapad.interactivestory'

Here is my code for my XML file

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.hylapad.interactivestory.MainActivity">

<ImageView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:srcCompat="@drawable/main_title"
    android:layout_alignParentTop="true"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true"
    android:id="@+id/titleImageView"
    android:scaleType="fitXY"
    android:adjustViewBounds="true"
    android:contentDescription="Signals from Mars"/>

</RelativeLayout>

Here is the code for my Gradle file:

apply plugin: 'com.android.application'

android { compileSdkVersion 22 buildToolsVersion "24.0.3" defaultConfig { applicationId "com.hylapad.interactivestory" minSdkVersion 14 targetSdkVersion 22 versionCode 1 versionName "1.0" testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } } }

dependencies { compile fileTree(dir: 'libs', include: ['*.jar']) androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', { exclude group: 'com.android.support', module: 'support-annotations' }) compile 'com.android.support:appcompat-v7:22.2.1' testCompile 'junit:junit:4.12' }