diff --git a/.travis.yml b/.travis.yml
index 2fa50f0e27a808806ae57e2484e483d124439ec9..b1f796a7c3c6efce6ef8a63390a64e9db969d93a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -26,7 +26,7 @@ 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 sphinx
+      pypandoc sphinx numpydoc
   - source activate test-environment
   - pip install nose-timer
   - pip install -r requirements.txt