From d5015eb4d97091343caa6d05398ad52d85748d65 Mon Sep 17 00:00:00 2001
From: Andrew Ning <aning@byu.edu>
Date: Fri, 25 Sep 2020 10:49:28 -0600
Subject: [PATCH] update changelog

---
 CHANGES.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/CHANGES.md b/CHANGES.md
index fa9e587..03c8fef 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,6 +1,10 @@
 # Changelog
 
 
+## [0.2.1] - Sep 2020
+
+- minor change to improve type flexibility in OperatingPoint (for AD usage)
+
 ## [0.2] - Sep 2020
 
 - WARNING: default is now a propeller instead of a turbine.  But turbine conventions are easily accessed through a flag.  Main reason was to better support rotorcraft usage, and because we already have example implementations from a turbine perspective thought it would be nice for the internal representation to use a propeller perspective so both are available.