diff --git a/.travis.yml b/.travis.yml
index f9860d9f3..6573a0b8d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,7 +13,7 @@ rvm:
   - 2.3.1
 before_install:
   - sudo apt-get -qq update
-  - sudo apt-get install -y curl git-core patch build-essential bison zlib1g-dev libssl-dev libxml2-dev libxml2-dev sqlite3 libsqlite3-dev autotools-dev libxslt1-dev libyaml-0-2 autoconf automake libreadline6-dev libyaml-dev libtool libgmp-dev libgdbm-dev libncurses5-dev pkg-config libffi-dev libmysqlclient-dev
+  - sudo apt-get install -y curl git-core patch build-essential bison zlib1g-dev libssl-dev libxml2-dev libxml2-dev sqlite3 libsqlite3-dev autotools-dev libxslt1-dev libyaml-0-2 autoconf automake libreadline6-dev libyaml-dev libtool libgmp-dev libgdbm-dev libncurses5-dev pkg-config libffi-dev libmysqlclient-dev postfix
   - mysql -u root -e "CREATE USER 'some_user'@'localhost' IDENTIFIED BY 'some_pass';"
   - mysql -u root -e "GRANT ALL PRIVILEGES ON *.* TO 'some_user'@'localhost';"
   - export RAILS_ENV=development