1 files changed, 3 insertions, 1 deletions

diff --git a/tox.ini b/tox.ini
index dab22a6d..257275ce 100644
--- a/tox.ini
+++ b/tox.ini
@@ -11,7 +11,9 @@ commands =
     coverage report -m
 
 [testenv:docs]
-deps = sphinx
+deps =
+    sphinx
+    sphinx_rtd_theme
 basepython = python2.7
 commands =
     sphinx-build -W -b html -d {envtmpdir}/doctrees docs docs/_build/html