diff --git a/.travis.yml b/.travis.yml
index e8b355c25..390e5f03d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,7 +7,7 @@ install:
  - sudo apt-get update >/dev/null
  - sudo apt-get -q install libprotoc-dev libprotobuf7 libprotobuf-dev libosmpbf-dev libbz2-dev libstxxl-dev libstxxl1 libxml2-dev libzip-dev libboost1.46-all-dev lua5.1 liblua5.1-0-dev libluabind-dev rubygems
  - curl -s https://gist.githubusercontent.com/DennisOSRM/803a64a9178ec375069f/raw/ | sudo bash
- - sudo apt-add-repository ppa:ubuntu-toolchain-r/test
+ - sudo apt-add-repository -y ppa:ubuntu-toolchain-r/test
  - sudo apt-get update
  - sudo apt-get  -q install g++-4.7
 before_script: