Unable to zipalign apk android android studio 2.2

I am publishing my app using android studio 2.2 preview 3 and generating signed apk. But when i am uploading apk to google play i am getting error

You uploaded an APK that is not zip aligned. You will need to run a zip align tool on your APK and upload it again.

Also i tried to used zipalign tool manually but i am getting error verification failed.
Here is my build.gradle file

android {
compileSdkVersion 23
buildToolsVersion "23.0.3"
defaultConfig {
    applicationId "blackdogs.newaomsi"
    minSdkVersion 16
    targetSdkVersion 23
    versionCode 1
    versionName "1.0"
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
    release {
        zipAlignEnabled true
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'


    }
}}

Got it. Error was due to gradle version i was using. Downgraded gradle version to