diff --git a/.travis.yml b/.travis.yml
index cbdc717..21260a8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,7 +4,7 @@ python:
   - 2.7
 before_install:
   - sudo apt-get update -qq
-  - sudo apt-get install -qq build-essential swig libevent-dev python-gevent python-m2crypto
+  - sudo apt-get install -qq build-essential libssl-dev swig libevent-dev python-gevent python-m2crypto
   - pip install gevent m2crypto
 script:
   - python test.py