diff --git a/.travis.yml b/.travis.yml
index 89af64ee..a68de2a2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -29,7 +29,7 @@ cache:
 before_install:
   - eval "${MATRIX_EVAL}"
   - gem install --no-ri --no-rdoc mtime_cache
-  - sudo add-apt-repository ppa:rexut/recoil
+  - sudo add-apt-repository -y ppa:rexut/recoil
   - sudo apt-get update
   - sudo apt-get install -y libboost1.63-dev libboost1.63-all-dev
   - sudo apt-get install -y libmysqlclient-dev libmysqlcppconn-dev