diff --git a/.travis.yml b/.travis.yml
index a8a0d1b..4898e65 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,13 +10,10 @@ before_install:
   - sudo apt-get install -qq python3-numpy
 
 # command to install dependencies
-install:
-  - pip install . --use-mirrors
+install: "pip install -r travis-requirements.txt --use-mirrors"
 
 # command to run tests
-script: 
-  - "python -m unittest discover"
+script: "python -m unittest discover"
 
 notifications:
-  email:
-    - john.g.evans.ne@gmail.com
+  email: "john.g.evans.ne@gmail.com"
diff --git a/travis-requirements.txt b/travis-requirements.txt
new file mode 100644
index 0000000..9dd042a
--- /dev/null
+++ b/travis-requirements.txt
@@ -0,0 +1,3 @@
+numpy
+contextlib2>=0.4.0
+mock>=1.0.1