diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9c5c5eb..29a6851 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,17 @@ 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).
 
+## [1.4.0] - 2023-08-19
+
+### Added
+
+- Errors when terminal methods (`toString`, `toRegExp`) are called on incomplete tokens
+
+### Changed
+
+- Updated README with code image
+- Changed capture groups to throw when group is empty
+
 ## [1.3.4] - 2023-08-18
 
 ### Added
@@ -95,3 +106,4 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 [1.3.2]: https://github.com/hlysine/readable-regexp/releases/tag/v1.3.2
 [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
diff --git a/package.json b/package.json
index 0b83666..48bf28f 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "readable-regexp",
-  "version": "1.3.4",
+  "version": "1.4.0",
   "author": "Henry Lin",
   "license": "MIT",
   "description": "Create readable Regular Expressions with concise and flexible syntax.",