Updated from global requirements

Change-Id: I9a86f7f96db8e2d8a8eb3662e9bd710fda19c5ef
diff --git a/test-requirements.txt b/test-requirements.txt
index 0929fb7..20c6653 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -10,4 +10,4 @@
 oslotest>=3.2.0 # Apache-2.0
 testrepository>=0.0.18 # Apache-2.0/BSD
 testtools>=2.2.0 # MIT
-openstackdocstheme>=1.17.0 # Apache-2.0
+openstackdocstheme>=1.18.1 # Apache-2.0