diff --git a/app/build.gradle b/app/build.gradle
index 1f627115..589fc17f 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -10,8 +10,8 @@ android {
         applicationId "com.simplemobiletools.contacts"
         minSdkVersion 16
         targetSdkVersion 27
-        versionCode 19
-        versionName "3.5.3"
+        versionCode 20
+        versionName "4.0.0"
         setProperty("archivesBaseName", "contacts")
     }