diff --git a/.travis.yml b/.travis.yml
index 0087162..80af1f2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -21,9 +21,8 @@ jobs:
 
 before_install:
 
-  - sudo service postgresql stop;
-  - sudo apt-get remove postgresql* -y
   - sudo apt-get install -y --allow-unauthenticated --no-install-recommends --no-install-suggests postgresql-$POSTGRESQL_VERSION postgresql-client-$POSTGRESQL_VERSION postgresql-server-dev-$POSTGRESQL_VERSION postgresql-common
+  - if [[ $POSTGRESQL_VERSION == '9.6' ]]; then sudo apt-get install -y postgresql-contrib-9.6; fi;
   - sudo apt-get install -y --allow-unauthenticated postgresql-$POSTGRESQL_VERSION-postgis-$POSTGIS_VERSION postgresql-$POSTGRESQL_VERSION-postgis-$POSTGIS_VERSION-scripts postgis
 
   # For pre12, install plpython2. For PG12 install plpython3