diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9c17a22..d1046db 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 The format is 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).
 
+## [Unreleased]
+### Changed
+- README.md introduction and requirements
+
 ## [0.4.1] - 2018-09-26
 ### Changed
 - Use execute_values() to batch insert records to PostgreSQL