diff --git a/vars/Ubuntu-18.yml b/vars/Ubuntu-18.yml
index 201acc3..8136224 100644
--- a/vars/Ubuntu-18.yml
+++ b/vars/Ubuntu-18.yml
@@ -8,3 +8,4 @@ __postgresql_packages:
   - postgresql
   - postgresql-contrib
   - libpq-dev
+postgresql_python_library: python3-psycopg2