diff --git a/app/build.gradle b/app/build.gradle
index eabea17..4fb06aa 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,7 +1,7 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 'android-P'
+    compileSdkVersion 28
     buildToolsVersion '27.0.3'
 
     defaultConfig {
@@ -40,11 +40,11 @@ dependencies {
     implementation fileTree(include: ['*.jar'], dir: 'libs')
     implementation 'com.android.support:appcompat-v7:28.0.0-alpha1'
     implementation 'com.android.support:design:28.0.0-alpha1'
-    implementation 'com.github.bumptech.glide:glide:4.0.0'
+    implementation 'com.github.bumptech.glide:glide:4.6.1'
     implementation 'com.android.support:support-v4:28.0.0-alpha1'
     implementation 'com.android.support:support-annotations:27.1.1'
     implementation 'com.android.support:cardview-v7:28.0.0-alpha1'
-    implementation 'com.android.support.constraint:constraint-layout:1.1.0'
+    implementation 'com.android.support.constraint:constraint-layout:1.1.2'
     implementation 'com.nex3z:flow-layout:1.0.0'
     implementation 'com.readystatesoftware.sqliteasset:sqliteassethelper:2.0.1'
     testImplementation 'junit:junit:4.12'
diff --git a/app/src/main/java/org/secuso/privacyfriendlybreakreminder/activities/tutorial/FirstLaunchManager.java b/app/src/main/java/org/secuso/privacyfriendlybreakreminder/activities/tutorial/FirstLaunchManager.java
index 0cee8e7..6b9a2d3 100644
--- a/app/src/main/java/org/secuso/privacyfriendlybreakreminder/activities/tutorial/FirstLaunchManager.java
+++ b/app/src/main/java/org/secuso/privacyfriendlybreakreminder/activities/tutorial/FirstLaunchManager.java
@@ -80,7 +80,7 @@ public class FirstLaunchManager {
                     .putInt(PREF_BREAK_PICKER_MINUTES, 5)
                     .putInt(PREF_PICKER_SECONDS, 0)
                     .putInt(PREF_PICKER_MINUTES, 0)
-                    .putInt(PREF_PICKER_HOURS, 1)
+                    .putInt(PREF_PICKER_HOURS, 2)
                     .putLong(WORK_TIME, 1000L * 60L * 60L) // 1 hour
                     .putString(EXERCISE_DURATION, "30")
                     .putBoolean(PREF_SCHEDULE_EXERCISE_DAYS_ENABLED, false)
diff --git a/app/src/main/res/values/styles.xml b/app/src/main/res/values/styles.xml
index 697a695..cc2fcea 100644
--- a/app/src/main/res/values/styles.xml
+++ b/app/src/main/res/values/styles.xml
@@ -35,9 +35,9 @@
         <item name="android:textStyle">bold</item>
     </style>
 
-    <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
+    <style name="AppTheme.AppBarOverlay" parent="Theme.AppCompat.Light.DarkActionBar" />
 
-    <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
+    <style name="AppTheme.PopupOverlay" parent="Theme.AppCompat.Light" />
 
     <style name="SplashTheme" parent="@android:style/Theme.NoTitleBar.Fullscreen">
         <item name="android:windowBackground">@drawable/bg_splash_screen</item>
diff --git a/build.gradle b/build.gradle
index 43c60c8..839bf11 100644
--- a/build.gradle
+++ b/build.gradle
@@ -10,7 +10,7 @@ buildscript {
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.2'
+        classpath 'com.android.tools.build:gradle:3.1.3'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files