diff --git a/.travis.yml b/.travis.yml
index 63e689e..b82b6c0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,6 +14,7 @@ addons:
       - libdb-dev
       - libpq-dev
       - libxml2-dev
+  postgresql: "9.4"
 before_script:
   - cp .travis.travelynx.conf travelynx.conf
   - psql -c 'create database travelynx_ci_test;' -U postgres
diff --git a/README.md b/README.md
index 8bdf03b..da19a34 100644
--- a/README.md
+++ b/README.md
@@ -45,9 +45,9 @@ Setup
 ---
 
 First, you need to set up a PostgreSQL database so that travelynx can store
-user accounts and journeys. Version 9.6 or later with UTF-8 locale (e.g.
-`en_US.UTF-8`) should work fine.  The following steps describe setup on a
-Debian 9 system, though setup on other distribution should be similar.
+user accounts and journeys. It must be at least version 9.4 and should use a
+UTF-8 locale. The following steps describe setup on a Debian 9 system, though
+setup on other distribution should be similar.
 
 * Write down a strong random password
 * Create a postgres user for travelynx: `sudo -u postgres createuser -P travelynx`