Updated from global requirements

Change-Id: Idf288ec61edcd5c29ee43714df529db6e873f555
diff --git a/test-requirements.txt b/test-requirements.txt
index 7a4ec28..add2388 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -4,7 +4,7 @@
 hacking>=1.0.0 # Apache-2.0
 
 sphinx!=1.6.6,>=1.6.2 # BSD
-openstackdocstheme>=1.17.0 # Apache-2.0
+openstackdocstheme>=1.18.1 # Apache-2.0
 reno>=2.5.0 # Apache-2.0
 fixtures>=3.0.0 # Apache-2.0/BSD
 mock>=2.0.0 # BSD