diff --git a/.travis.yml b/.travis.yml
index 3fa9427..26d0ae3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,6 @@ python:
   - "2.7"
   - "3.6"
 install:
-  - pip install numpy svgwrite
+  - pip install numpy svgwrite scipy
 script:
   - python -m unittest discover test