diff --git a/app/build.gradle b/app/build.gradle
index 8fddedea4126..adc41c29e9d9 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -151,7 +151,7 @@ android {
         }
         release {
             minifyEnabled false
-            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
             manifestPlaceholders = [
                     appIcon     : "@mipmap/ic_launcher_red",
                     appIconRound: "@mipmap/ic_launcher_red_round"