diff --git a/CHANGELOG.md b/CHANGELOG.md
index b062547..73f7f15 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,14 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [3.9.0] - [TBD]
+### Added
+- support `isolatedModules` and `preserveValueImports` compilation scenarios [#305](https://github.com/eleith/emailjs/pull/305)
+
+### Fixed
+- support `typescript@3.8.3` [#307](https://github.com/eleith/emailjs/issues/307)
+	- the types change in `v3.8.0` for `Client#send` & `Client#sendAsync` unintentionally raised the minimum `typescript` requirement. fixing this involved weakening the types for those functions, which may require modifying your code. this change will be reverted for `v4.0.0`.
+
 ## [3.8.0] - 2022-03-17
 ### Added
 - support `typescript@4.6`