diff --git a/README.md b/README.md
index 59372d0..dfc89f9 100644
--- a/README.md
+++ b/README.md
@@ -2,28 +2,33 @@
 [![Build Status](https://www.bitrise.io/app/6ba47c24369dd52a/status.svg?token=XyF0AXasZwgKuoub_tJUYA&branch=master)](https://www.bitrise.io/app/6ba47c24369dd52a)
 
 # Android Week View
-Android library for displaying an overview of events for a week like in a schedule(us) or timetable(uk). 
 
-It's the week view initially used in Schedule Deluxe (https://play.google.com/store/apps/details?id=com.tobiasschuerg.stundenplan), 
+Android library for displaying an overview of events for a week
+like in a schedule(us) or timetable(uk).
+
+It's the week view initially used in Schedule
+Deluxe (https://play.google.com/store/apps/details?id=com.tobiasschuerg.stundenplan),
 which is now outsourced in favor of a better modularization.
 
 <img src="https://github.com/tobiasschuerg/android-week-view/blob/master/meta/device-2018-02-24-121341.png" height="400">
 
 ## Usage:
+
 See `SampleActivity.kt` for how to use the week view.
 
 ### In short:
+
 1. Attach the view to your layout:
+
 ```xml
-<de.tobiasschuerg.weekview.view.WeekView
-    android:id="@+id/week_view"
-    android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    app:accent_color="@color/colorAccent"
-    app:start_hour="8"
-    app:end_hour="15" />
+
+<de.tobiasschuerg.weekview.view.WeekView android:id="@+id/week_view"
+    android:layout_width="match_parent" android:layout_height="wrap_content"
+    app:accent_color="@color/colorAccent" app:start_hour="8" app:end_hour="15" />
 ```
+
 2. Configure how events are displayed (optional):
+
 ```kotlin
 val config = EventConfig(showSubtitle = false, showTimeEnd = false)
 weekView.eventConfig = config
@@ -31,6 +36,7 @@ weekView.setShowNowIndicator(true)
 ```
 
 3Add events:
+
 ```kotlin
 val nowEvent = Event.Single(
     id = 1337,
@@ -44,10 +50,15 @@ val nowEvent = Event.Single(
 weekView.addEvent(nowEvent)
 ```
 
+## Desugaring:
+
+Starting from version 1.8.0, Android Week View has switched from JakeWharton's ThreeTen Backport
+to desugaring for `java.time`-API.
 
 ## Get it
 
 1. Add it in your root build.gradle at the end of repositories:
+
 ```gradle
 allprojects {
   repositories {
@@ -56,7 +67,9 @@ allprojects {
   }
 }
 ```
+
 2. Step 2. Add the dependency
+
 ```gradle
 dependencies {
   compile 'com.github.tobiasschuerg:android-week-view:-SNAPSHOT'
diff --git a/build.gradle b/build.gradle
index 2ab117f..cb118f7 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,8 +1,8 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.lib_version = '1.8.1' // this lib
-    ext.kotlin_version = '1.9.20'
+    ext.lib_version = '1.9.0' // this lib
+    ext.kotlin_version = '1.9.22'
 
     repositories {
         google()
@@ -31,6 +31,6 @@ allprojects {
     }
 }
 
-task clean(type: Delete) {
+tasks.register('clean', Delete) {
     delete rootProject.buildDir
 }