diff --git a/.travis.yml b/.travis.yml
index 2592bfc64cd7..740e6f0113e6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -115,8 +115,10 @@ install:
     pip install --upgrade setuptools
   - |
     # Install dependencies from pypi
-    pip install $PRE python-dateutil $NUMPY pyparsing!=2.1.6 $PANDAS cycler codecov coverage $MOCK $NOSE
-    pip install $PRE -r doc-requirements.txt
+    pip install $PRE python-dateutil $NUMPY pyparsing!=2.1.6 $PANDAS cycler codecov coverage $MOCK $NOSE sphinx pillow
+    if [[ $BUILD_DOCS == true ]]; then
+      pip install $PRE -r doc-requirements.txt
+    fi
 
     # pytest-cov>=2.3.1 due to https://github.com/pytest-dev/pytest-cov/issues/124
     pip install $PRE pytest 'pytest-cov>=2.3.1' pytest-faulthandler pytest-rerunfailures pytest-timeout pytest-warnings pytest-xdist $INSTALL_PEP8