diff --git a/app/build.gradle b/app/build.gradle
index b723803..3deb6b4 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,7 +1,7 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 26
+    compileSdkVersion 28
     defaultConfig {
         applicationId "de.simonlaux.ziphtmlviewer"
         // don't go bellow 19, otherwise you may introduce web-view security risks