diff --git a/CHANGELOG.md b/CHANGELOG.md
index e559916..4ced753 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -22,6 +22,25 @@ Updates should follow the [Keep a CHANGELOG](http://keepachangelog.com/) princip
 ### Security
 - Nothing
 --->
+## 1.5.0 - 2020-04-24
+
+#### April 24, 2020
+#### Bot API 4.8
+
+### Added
+- Supported explanations for
+ [**Quizzes 2.0**](https://telegram.org/blog/400-million#better-quizzes). 
+Add explanations by specifying the parameters 
+explanation and `explanationParseMode` in the method `SendPollMethod`.
+- Added the fields explanation and `explanationEntities` to the `PollType` class.
+- Supported timed polls that automatically close at a certain date and time. 
+Set up by specifying the parameter `openPeriod` or `closeDate` in the `SendPollMethod`.
+- Added the fields `openPeriod` and `closeDate` to the `PollType` class.
+- Supported the new darts animation for the dice mini-game. 
+Choose between the default dice animation and darts animation 
+by specifying the parameter `emoji` in the `SendDiceMethod`. 
+Added two factory methods `createWithDice` and `createWithDarts`  for `SendDiceMethod`.
+- Added the field `emoji` to the `DiceType` class.
 
 ## 1.4.0 - 2020-03-31
 
diff --git a/README.md b/README.md
index 685d28c..a35c5f4 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@
 [![Duplicated Lines (%)][sonar-duplicated-lines-icon]][sonar-path]
 [![Security Rating][sonar-security-rating-icon]][sonar-path]
 
-#### Supported Telegram Bot API v4.6 (January 23, 2020 update)
+#### Supported Telegram Bot API v4.8 (April 24, 2020)
 
 ## Installation
 
@@ -146,7 +146,7 @@ If you discover any security related issues, please email wformps@gmail.com inst
 The MIT License (MIT). Please see [License File](LICENSE.md) for more information.
 
 [ico-php-v]: https://img.shields.io/travis/php-v/tg-bot-api/bot-api-base.svg?style=flat-square
-[ico-bot-api]: https://img.shields.io/badge/Bot%20API-4.7-blue.svg?style=flat-square
+[ico-bot-api]: https://img.shields.io/badge/Bot%20API-4.8-blue.svg?style=flat-square
 [ico-version]: https://img.shields.io/packagist/v/tg-bot-api/bot-api-base.svg?style=flat-square
 [ico-license]: https://img.shields.io/badge/license-MIT-brightgreen.svg?style=flat-square
 [ico-travis]: https://img.shields.io/travis/tg-bot-api/bot-api-base/master.svg?style=flat-square