diff --git a/.travis.yml b/.travis.yml
index 9bdd478db..3b719e498 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,7 +4,7 @@ before_install:
     - sudo apt-get remove cmake cmake-data --yes
     - sudo add-apt-repository ppa:george-edison55/precise-backports --yes
     - sudo add-apt-repository ppa:terry.guo/gcc-arm-embedded --yes
-    - sudo add-apt-repository ppa:nonolith/avr-toolchain
+    - sudo add-apt-repository ppa:nonolith/avr-toolchain --yes
     - sudo apt-get update
 
 install: