diff --git a/.travis.yml b/.travis.yml
index bb5b631e236eb2495ea7b53b9894e260828ee6c0..7d01420a752e5daa62ff123a2169596fc1b0f659 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,7 +7,7 @@ before_script:
   - chmod +x ./cc-test-reporter
   - ./cc-test-reporter before-build
   - pip install -r requirements.txt
-  - pip install -U nose2 coverage
+  - pip install -U nose2 coverage Cython satella snakehouse
   - python setup.py build_ext --inplace
 jobs:
   include: