diff --git a/.travis.yml b/.travis.yml
index 10ae4c6..c4f172b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,6 +16,7 @@ python:
 before_install: sudo apt-get install libxml2-dev libxslt-dev
 # command to install dependencies
 install:
+  - pip install -U pip wheel setuptools
   - python setup.py install
   - make deps
 # command to run tests
diff --git a/MANIFEST.in b/MANIFEST.in
index 55fa275..5caeb8a 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -2,3 +2,5 @@ include README.rst
 include CHANGELOG.rst
 include LICENSE.rst
 include AUTHORS.txt
+recursive-exclude * __pycache__
+recursive-exclude * *.py[co]