Iterating on .travis.yml.
diff --git a/.travis.yml b/.travis.yml
index 3a5202b..bcb2de4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,6 +7,9 @@
   - "3.4"
   - "nightly"
 # command to install dependencies
-install: pip install .[test]
+install:
+ - pip install -U pip
+ - pip install -U wheel setuptools
+ - pip install .[test]
 # command to run tests
 script: unit2