diff --git a/.travis.yml b/.travis.yml
index f0b5fe97..a487a862 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,8 +9,8 @@ cache:
   - "$HOME/.android/build-cache"
 android:
   components:
-  - build-tools-27.0.3
-  - android-27
+  - build-tools-28.0.3
+  - android-28
 before_install:
 - openssl aes-256-cbc -K $encrypted_89744ce7a44a_key -iv $encrypted_89744ce7a44a_iv -in secrets.tar.enc -out secrets.tar -d
 - tar xvf secrets.tar
diff --git a/xkcd/build.gradle b/xkcd/build.gradle
index 5f70e233..625888e4 100644
--- a/xkcd/build.gradle
+++ b/xkcd/build.gradle
@@ -3,15 +3,15 @@ apply plugin: 'io.fabric'
 apply plugin: 'io.objectbox'
 
 android {
-    compileSdkVersion 27
-    buildToolsVersion '27.0.3'
+    compileSdkVersion 28
+    buildToolsVersion '28.0.3'
 
     defaultConfig {
         applicationId "xyz.jienan.xkcd"
         minSdkVersion 16
-        targetSdkVersion 27
-        versionCode 14
-        versionName "2.1.1"
+        targetSdkVersion 28
+        versionCode 15
+        versionName "2.1.2"
         vectorDrawables.useSupportLibrary = true
     }
     signingConfigs {