diff --git a/upper-constraints.txt b/upper-constraints.txt
index 22c0742725..fe9e23fb34 100644
--- a/upper-constraints.txt
+++ b/upper-constraints.txt
@@ -355,7 +355,7 @@ Sphinx===1.6.5
 oslo.config===5.2.0
 tempest===18.0.0
 django-floppyforms===1.7.0
-openstackdocstheme===1.19.0
+openstackdocstheme===1.20.0
 osc-placement===1.0.0
 zake===0.2.2
 python-rsdclient===0.1.3