diff --git a/.travis.yml b/.travis.yml
index 8f911e465ba42156a4ee2a26340b789b26ae1096..2fa50f0e27a808806ae57e2484e483d124439ec9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -25,7 +25,8 @@ addons:
 install:
   - >
       conda create -q -n test-environment python=$TRAVIS_PYTHON_VERSION
-      numpy scipy nose pandas matplotlib mkl-service 'tensorflow>=1.1.0,<2.0.0' pypandoc
+      numpy scipy nose pandas matplotlib mkl-service 'tensorflow>=1.1.0,<2.0.0'
+      pypandoc sphinx
   - source activate test-environment
   - pip install nose-timer
   - pip install -r requirements.txt