diff --git a/tox.ini b/tox.ini
index 791f812a..854f888f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py{27,34,35,36}-sphinx{13,14,15}, docs
+envlist = py{27,34,35,36}-sphinx{13,14,15,16}, docs
 
 [tox:travis]
 2.7 = py27-sphinx{13,14,15}