com.android.builder.dexing.DexArchiveMergerException: Unable to merge dex

getting unable to merge dex error on build after adding compile 'com.theartofdev.edmodo:android-image-cropper:2.7.+'

when i remove this entry from gradle then everything is fine.
**current dependencies:**
```
dependencies {
implementation fileTree(include: ['*.jar'], dir: 'libs')
implementation 'com.android.support:appcompat-v7:26.1.0'
implementation 'com.android.support.constraint:constraint-layout:1.0.2'
implementation 'com.android.support:support-v4:26.1.0'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.1'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
implementation 'com.android.support:design:26.1.0'

implementation 'com.android.support:cardview-v7:26.1.0'
implementation 'com.google.android.gms:play-services-maps:11.8.0'
implementation 'com.github.PhilJay:MPAndroidChart:v3.0.3'
implementation 'de.hdodenhof:circleimageview:2.2.0'

implementation 'com.makeramen:roundedimageview:2.3.0'

compile 'com.daimajia.easing:library:2.0@aar'
compile 'com.daimajia.androidanimations:library:2.3@aar'

compile 'com.squareup.retrofit2:retrofit:2.3.0'
implementation 'com.squareup.retrofit2:converter-gson:2.3.0'
implementation 'com.squareup.okhttp3:logging-interceptor:3.3.0'
implementation 'com.squareup.retrofit2:converter-scalars:2.3.0'
implementation 'com.google.code.gson:gson:2.7'
implementation 'com.karumi:dexter:4.1.0'
compile 'com.theartofdev.edmodo:android-image-cropper:2.7.+'
}

```