diff --git a/.travis.yml b/.travis.yml
index 123041c4..ab376549 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,6 +4,7 @@ python:
   - "2.7"
 install:
   - pip install -r python/test_requirements.txt --use-mirrors
+  - apt-get install mono-devel
 compiler:
   - gcc
   - clang