diff --git a/scripts/xos_dev_reqs.txt b/scripts/xos_dev_reqs.txt
index b306f5a..983e1c3 100644
--- a/scripts/xos_dev_reqs.txt
+++ b/scripts/xos_dev_reqs.txt
@@ -1,5 +1,5 @@
 Jinja2==2.10
-Pattern==2.6
+inflect==1.0.1
 PyYAML==3.12
 Twisted==16.6.0
 astunparse==1.5.0