travis: sudo pip install

.travis.yml

@@ -20,11 +20,11 @@ addons:
 
 install:
   - export PATH="/home/travis/bin:/home/travis/.local/bin:/home/travis/.gimme/versions/go1.5.1.linux.amd64/bin:/home/travis/.local/bin:/usr/local/rvm/gems/ruby-2.2.3/bin:/usr/local/rvm/gems/ruby-2.2.3@global/bin:/usr/local/rvm/rubies/ruby-2.2.3/bin:/home/travis/.phpenv/shims:/usr/local/phantomjs/bin:/usr/local/phantomjs:/home/travis/perl5/perlbrew/bin:/home/travis/.nvm/versions/node/v4.1.2/bin:./node_modules/.bin:/usr/local/maven-3.1.1/bin:/usr/local/gradle/bin:/usr/local/clang-3.5.0/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/home/travis/.phpenv/bin:/usr/local/rvm/bin"
-  - pip install -r requirements.txt
-  - pip install coveralls
+  - sudo pip install -r requirements.txt
+  - sudo pip install coveralls
   # Alternative: setup.py install.
   # Using pip makes sure that the package is pip-compatible, too.
-  - pip install .
+  - sudo pip install .
 
 # run tests
 script: