diff --git a/roles/matrix/tasks/main.yml b/roles/matrix/tasks/main.yml
index 833a6bb..9513b64 100644
--- a/roles/matrix/tasks/main.yml
+++ b/roles/matrix/tasks/main.yml
@@ -17,7 +17,7 @@
   - python-psycopg2
 
 - name: Configure PostgreSQL database
-  postgresql_db: name={{ matrix_dbname }}
+  postgresql_db: name={{ matrix_dbname }} lc_collate=C lc_ctype=C template=template0
   become: true
   become_user: postgres