diff --git a/.travis.yml b/.travis.yml
index db4d9b1..a8eb786 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,7 +7,7 @@ before_install:
  - sudo /etc/init.d/postgresql stop
  - sudo apt-get update
  - sudo apt-get purge postgresql-9.1 postgresql-9.2 postgresql-9.3
- - sudo apt-get install postgresql-client-common postgresql-9.4
+ - sudo apt-get install postgresql-client-common postgresql-9.4 postgresql-contrib-9.4
  - sudo apt-get install pidentd
  - sudo chmod 777 /etc/postgresql/9.4/main/pg_hba.conf
  - sudo echo "local   all         postgres                          trust" >  /etc/postgresql/9.4/main/pg_hba.conf