diff --git a/README.rst b/README.rst
index 861286cf..7d144cad 100644
--- a/README.rst
+++ b/README.rst
@@ -159,6 +159,8 @@ Projects using this library
 
 * `AMPL/MP <https://github.com/ampl/mp>`_:
   An open-source library for mathematical programming
+  
+* `AvioBook <https://www.aviobook.aero/en>`_: A comprehensive aircraft operations suite.
 
 * `CUAUV <http://cuauv.org/>`_: Cornell University's autonomous underwater vehicle