diff --git a/build.gradle b/build.gradle
index 7b04808c9f..c3e03cd990 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,5 +1,3 @@
-import org.signal.signing.ApkSignerUtil
-
 import java.security.MessageDigest
 
 buildscript {
@@ -194,11 +192,11 @@ android {
     }
 
     defaultConfig {
-        versionCode 3
+        versionCode 4
         versionName "1.0.0"
 
         minSdkVersion 21
-        targetSdkVersion 26
+        targetSdkVersion 28
         multiDexEnabled true
 
         vectorDrawables.useSupportLibrary = true