diff --git a/build.gradle b/build.gradle
index df5db71..c162c24 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,4 +1,5 @@
 apply plugin: 'com.android.library'
+apply plugin: 'me.tatarka.retrolambda'
 
 android {
     compileSdkVersion 26