diff --git a/CHANGELOG.md b/CHANGELOG.md
index 29a6851..67bbe48 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,22 @@ All notable changes to this project will be documented in this file.
 The format is loosely based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.5.0] - 2023-08-20
+
+### Added
+
+- Exports for helper types used to compose token types
+- Export for the `RegExpToken` interface
+- **Custom tokens API** via `defineToken`
+- Support for merging nested character groups
+- `charRange` and `notCharRange` tokens
+
+### Changed
+
+- `group` no longer wraps expressions with extra layers of non-capture groups if the expression is already grouped
+- Fixed incorrect escapes of backslashes and dashes in character groups
+- Moved documentation from README to Gitbook for better organization
+
 ## [1.4.0] - 2023-08-19
 
 ### Added
@@ -107,3 +123,4 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 [1.3.3]: https://github.com/hlysine/readable-regexp/releases/tag/v1.3.3
 [1.3.4]: https://github.com/hlysine/readable-regexp/releases/tag/v1.3.4
 [1.4.0]: https://github.com/hlysine/readable-regexp/releases/tag/v1.4.0
+[1.5.0]: https://github.com/hlysine/readable-regexp/releases/tag/v1.5.0
diff --git a/package.json b/package.json
index ad92b8c..7cf6479 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "readable-regexp",
-  "version": "1.4.0",
+  "version": "1.5.0",
   "author": "Henry Lin",
   "license": "MIT",
   "description": "Regular Expressions - quick and concise, readable and composable.",