diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8554f1c..8ac3938 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,9 @@
 # Change Log
 All notable changes to this project will be documented in this file.
 
-## [Unreleased](https://github.com/xsolla/xsolla-sdk-php/compare/v3.0.3...master)
+## [Unreleased](https://github.com/xsolla/xsolla-sdk-php/compare/v3.1.0...master)
+
+## [v3.1.0](https://github.com/xsolla/xsolla-sdk-php/compare/v3.0.3...3.1.0) - 2018-09-05
 ### Added
 * Methods CreateCouponPromotion, ListCouponPromotions, CreateCoupon
 * Tests
diff --git a/src/Version.php b/src/Version.php
index 8d4a7e7..2e3c3a8 100644
--- a/src/Version.php
+++ b/src/Version.php
@@ -6,7 +6,7 @@
 
 class Version
 {
-    const VERSION = 'v3.0.3';
+    const VERSION = 'v3.1.0';
 
     /**
      * @throws XsollaException