diff --git a/.travis.yml b/.travis.yml
index ce813654e..3dcc7e2f7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,7 +5,7 @@ python:
   - pypy
 # command to install dependencies, e.g. pip install -r requirements.txt --use-mirrors
 install:
-  - "pip install --upgrade --src . -r requirements.txt"
+  - "pip install --src . -r requirements.txt"
 # command to run tests, e.g. python setup.py test
 script: 
   - "nosetests --with-cov --cov-report term-missing"