diff --git a/lib/xos-genx/setup.py b/lib/xos-genx/setup.py
index 109af47..c97ba52 100644
--- a/lib/xos-genx/setup.py
+++ b/lib/xos-genx/setup.py
@@ -35,7 +35,7 @@
       include_package_data=True,
       # TODO add all deps to the install_requires section
       install_requires=[
-          'pattern>=2.6',
+          'inflect>=1.0.1',
           'astunparse>=1.5.0'
           ]
      )