diff --git a/app/build.gradle b/app/build.gradle
index af3195f..19a1bb1 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -9,7 +9,7 @@ android {
     defaultConfig {
         applicationId "com.events.calendarsample"
         minSdkVersion 19
-        targetSdkVersion 28
+        targetSdkVersion 27
         versionCode 1
         versionName "1.0"
     }