diff --git a/app/build.gradle b/app/build.gradle
index 61e35152..75606435 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -3,13 +3,13 @@ apply plugin: 'kotlin-android'
 apply plugin: 'kotlin-android-extensions'
 
 android {
-    compileSdkVersion 27
-    buildToolsVersion "27.0.3"
+    compileSdkVersion 28
+    buildToolsVersion "28.0.2"
 
     defaultConfig {
         applicationId "com.simplemobiletools.contacts"
         minSdkVersion 16
-        targetSdkVersion 27
+        targetSdkVersion 28
         versionCode 29
         versionName "4.2.2"
         setProperty("archivesBaseName", "contacts")
@@ -45,7 +45,7 @@ ext {
 }
 
 dependencies {
-    implementation 'com.simplemobiletools:commons:4.6.7'
+    implementation 'com.simplemobiletools:commons:4.6.15'
     implementation 'joda-time:joda-time:2.9.9'
     implementation 'com.facebook.stetho:stetho:1.5.0'
     implementation 'com.android.support.constraint:constraint-layout:1.1.2'