diff --git a/.idea/caches/build_file_checksums.ser b/.idea/caches/build_file_checksums.ser
index 1c2d2c3..14fc554 100644
Binary files a/.idea/caches/build_file_checksums.ser and b/.idea/caches/build_file_checksums.ser differ
diff --git a/app/release/app-release.apk b/app/release/app-release.apk
index 6e62637..add0ccc 100644
Binary files a/app/release/app-release.apk and b/app/release/app-release.apk differ
diff --git a/app/src/main/java/nonphatic/quoz/preferences/SettingsActivity.kt b/app/src/main/java/nonphatic/quoz/preferences/SettingsActivity.kt
index 67f42f5..c4d8f41 100644
--- a/app/src/main/java/nonphatic/quoz/preferences/SettingsActivity.kt
+++ b/app/src/main/java/nonphatic/quoz/preferences/SettingsActivity.kt
@@ -4,7 +4,6 @@ package nonphatic.quoz.preferences
 import android.annotation.TargetApi
 import android.content.Context
 import android.content.Intent
-import android.content.SharedPreferences
 import android.content.res.Configuration
 import android.media.AudioManager
 import android.os.Build
@@ -12,7 +11,6 @@ import android.os.Bundle
 import android.preference.ListPreference
 import android.preference.Preference
 import android.preference.PreferenceActivity
-import android.support.v7.app.ActionBar
 import android.preference.PreferenceFragment
 import android.preference.PreferenceManager
 import android.view.MenuItem
diff --git a/build.gradle b/build.gradle
index 09f9f5e..af5b534 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,13 +1,13 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.2.41'
+    ext.kotlin_version = '1.2.50'
     repositories {
         jcenter()
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.2'
+        classpath 'com.android.tools.build:gradle:3.1.3'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 
         // NOTE: Do not place your application dependencies here; they belong