diff --git a/app/src/main/kotlin/jackall/moncalc/activity/MainActivity.kt b/app/src/main/kotlin/jackall/moncalc/activity/MainActivity.kt
index 352b493..c8a1050 100644
--- a/app/src/main/kotlin/jackall/moncalc/activity/MainActivity.kt
+++ b/app/src/main/kotlin/jackall/moncalc/activity/MainActivity.kt
@@ -4,6 +4,7 @@
 import android.databinding.DataBindingUtil
 import android.os.Bundle
 import android.support.v7.app.AppCompatActivity
+import com.google.android.gms.ads.AdSize
 import com.google.gson.Gson
 import com.google.gson.stream.JsonReader
 import io.realm.RealmList
@@ -107,6 +108,6 @@
 
     override fun onStart() {
         super.onStart()
-        AdUtil.startBannerAd(this, mainBinding.root.main_banner_layout, Const.BannerUnitId)
+        AdUtil.startBannerAd(this, mainBinding.root.main_banner_layout, AdSize.BANNER, Const.BannerUnitId)
     }
 }
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