diff --git a/android/build.gradle b/android/build.gradle
index 7b8c225..5456e71 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -12,12 +12,12 @@ buildscript {
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion 23
-    buildToolsVersion "23.0.1"
+    compileSdkVersion 28
+    buildToolsVersion "28.0.3"
 
     defaultConfig {
         minSdkVersion 16
-        targetSdkVersion 22
+        targetSdkVersion 28
         versionCode 1
         versionName "1.0"
     }
@@ -34,4 +34,4 @@ dependencies {
     compile 'com.facebook.react:react-native:+'
     compile fileTree(dir: "libs", include: ["*.aar"])
 }
-  
\ No newline at end of file
+  
diff --git a/android/src/main/java/com/unityads/RNUnityAdsModuleModule.java b/android/src/main/java/com/unityads/RNUnityAdsModuleModule.java
index d19a881..b8d7cca 100644
--- a/android/src/main/java/com/unityads/RNUnityAdsModuleModule.java
+++ b/android/src/main/java/com/unityads/RNUnityAdsModuleModule.java
@@ -13,7 +13,7 @@
 import com.facebook.react.modules.core.DeviceEventManagerModule;
 import android.support.annotation.Nullable;
 
-public class RNUnityAdsModuleModule extends ReactContextBaseJavaModule {
+public class RNUnityAdsModuleModule extends ReactContextBaseJavaModule implements IUnityAdsListener {
 
   private final ReactApplicationContext reactContext;
 
@@ -129,5 +129,4 @@ public void onUnityAdsError(UnityAds.UnityAdsError error, String message) {
 
     sendEvent(reactContext,"Error", params);
   }
-
-}
\ No newline at end of file
+}