diff --git a/README.md b/README.md
index 41bdc07..b351a05 100644
--- a/README.md
+++ b/README.md
@@ -73,6 +73,10 @@ Help support Gdspy development by [donating via PayPal](https://www.paypal.com/c
 
 ## History of changes
 
+### Version 1.6.6 (Jun 09, 2021)
+* Fix error in `Path.smooth` not finding `_hobby` function.
+* Allow precision specification in SVG output.
+
 ### Version 1.6.5 (Jun 08, 2021)
 * Support GDSII files with 0-padding at the end.
 * Allow fixing and modifying GDSII file timestamps.
diff --git a/gdspy/__init__.py b/gdspy/__init__.py
index 6cefe92..addd03f 100644
--- a/gdspy/__init__.py
+++ b/gdspy/__init__.py
@@ -19,7 +19,7 @@
 - http://www.buchanan1.net/stream_description.html
 """
 
-__version__ = "1.6.5"
+__version__ = "1.6.6"
 
 import warnings