diff --git a/.travis/install.sh b/.travis/install.sh
index cad0e3c32..f18aff079 100755
--- a/.travis/install.sh
+++ b/.travis/install.sh
@@ -15,6 +15,7 @@ pip install -U pytest
 pip install -U pytest-cov
 pip install pyroma
 pip install test-image-results
+pip install numpy
 
 # docs only on Python 2.7
 if [ "$TRAVIS_PYTHON_VERSION" == "2.7" ]; then pip install -r requirements.txt ; fi