diff --git a/ontobio/__init__.py b/ontobio/__init__.py
index d33d4873..bf506135 100644
--- a/ontobio/__init__.py
+++ b/ontobio/__init__.py
@@ -1,6 +1,6 @@
 from __future__ import absolute_import
 
-__version__ = '2.9.8'
+__version__ = '2.9.9'
 
 
 from .ontol_factory import OntologyFactory