diff --git a/.travis.yml b/.travis.yml
index 486827a373562223bee9570f2277dcb5b519ded4..c2bccc22871f884e9288b381ad0a554592f56eb4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,7 +7,7 @@ python:
   - "pypy"
 install:
   - sudo apt-get install python-pip
-  - /usr/bin/pip install git+git://github.com/pyinvoke/invoke.git
+  - sudo /usr/bin/pip install git+git://github.com/pyinvoke/invoke.git
   - 'if [ -n "${VAR+x}" ]; then: invoke install-nacl --library=$NACL; fi'
   - 'if [ -n "${VAR+x}" ]; then: invoke install --dev; fi'
 script: