diff --git a/.virtualenv.dev-requirements.txt b/.virtualenv.dev-requirements.txt
index a063fd36..0eeffdb4 100644
--- a/.virtualenv.dev-requirements.txt
+++ b/.virtualenv.dev-requirements.txt
@@ -31,7 +31,7 @@ flake8
 
 # Generate Data Structures from XML Schema
 # http://pythonhosted.org/generateDS
-generateDS==2.9a
+generateDS
 
 # for building documentation
 sphinx