diff --git a/tuto3.yml b/tuto3.yml
index 4642e40..8b8206c 100644
--- a/tuto3.yml
+++ b/tuto3.yml
@@ -287,7 +287,7 @@ files:
   - path: /initdb/init-matrix.sql
     contents: |
       CREATE USER matrix WITH PASSWORD 'adlin2021';
-      CREATE DATABASE matrix;
+      CREATE DATABASE matrix ENCODING 'UTF8' LC_COLLATE='C' LC_CTYPE='C' TEMPLATE template0 OWNER matrix;
       GRANT ALL PRIVILEGES ON DATABASE matrix TO matrix;
     mode: "0444"