diff --git a/.travis.yml b/.travis.yml
index aab0cfe..243f71c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,7 +2,7 @@ sudo: required
 dist: trusty
 language: python
 install:
-  - sudo apt-get install graphicsmagick libav-tools
+  - sudo apt-get install graphicsmagick libav-tools -y
   - pip install -r requirements.txt
   - python setup.py develop
 python: