diff --git a/.travis.yml b/.travis.yml
index 7ec99ef..21d288c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,7 +9,6 @@ script:
 
 before_script:
  - sudo apt-get -qq update > /dev/null
- - sudo apt-get -qq install graphviz > /dev/null
  - phpenv rehash > /dev/null
  - composer selfupdate --quiet
  - composer install --dev