diff --git a/README.md b/README.md
index 2a63458..4125809 100644
--- a/README.md
+++ b/README.md
@@ -17,9 +17,9 @@ Role Variables
 - `im_domain`: the domain this app will run on (Needed for django's ALLOWED_HOSTS), default localhost
 - `im_db_name`: database name, defaults to 'im'
 - `im_db_user`: database user, defaults to 'im'
-- `im_db_password`: database password (optional)
-- `im_db_host`: database server, defaults to 'localhost'
-- `im_db_port`: database port, defaults to 5432
+- `im_db_password`: database password, defaults to '', (ignored for unix socket connection)
+- `im_db_host`: database server, defaults to '/run/postgresql/' for local unix socket connection
+- `im_db_port`: database port, defaults to 5432 (ignored for unix socket connection)
 - `im_workers`: the number of gunicorn http worker threads (defaults to 4)
 - `im_http_listen`: the ip address to bind to, change this to ip address of the host if you use a reverse proxy on a different host, defaults to localhost
 - `im_http_port`: the http port to bind to, defaults to 80
diff --git a/vars/main.yml b/vars/main.yml
index 533e394..4524234 100644
--- a/vars/main.yml
+++ b/vars/main.yml
@@ -6,7 +6,7 @@ im_domain: 'localhost'
 im_db_name: 'im'
 im_db_user: 'im'
 im_user: 'im'
-im_db_server: 'localhost'
+im_db_server: '/run/postgresql/'
 im_db_port: '5432'
 im_db_password: ''
 im_workers: 4