diff --git a/README.md b/README.md
index 70195a2ea0bc1a2f19def61e2db795fe319b4591..4f4009ad6e5d4bcff0787fa91df457c48d909008 100644
--- a/README.md
+++ b/README.md
@@ -18,6 +18,10 @@ Written by Ian Bell, NIST.
 
 [![PyPI version](https://badge.fury.io/py/teqp.svg)](https://badge.fury.io/py/teqp)
 
+* 0.9.1 :
+
+  * Transcription error in a coefficient of PC-SAFT
+
 * 0.9.0 :
 
   * Add ability to obtain ancillaries for multifluid model (``see teqp/models/multifluid_ancillaries.hpp``) or the ``build_ancillaries`` method in python
diff --git a/interface/teqpversion.hpp b/interface/teqpversion.hpp
index d907574bd353cc947ff797be7ff59b1af8086e11..2d65a2468df29ce93f1fb2f560de5080f2ec9da5 100644
--- a/interface/teqpversion.hpp
+++ b/interface/teqpversion.hpp
@@ -1,2 +1,2 @@
 #include <string>
-const std::string TEQPVERSION = "0.9.1.dev0";
\ No newline at end of file
+const std::string TEQPVERSION = "0.9.1";
\ No newline at end of file