diff --git a/synapse/docker-compose.yml b/synapse/docker-compose.yml
index 428095f..308f823 100644
--- a/synapse/docker-compose.yml
+++ b/synapse/docker-compose.yml
@@ -8,6 +8,7 @@ services:
       POSTGRES_DB: ${POSTGRES_DB}
       POSTGRES_USER: ${POSTGRES_USER}
       POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+      POSTGRES_INITDB_ARGS: '--encoding=UTF-8  --locale=C --template=template0'
   synapse:
     image: matrixdotorg/synapse:v1.124.0
     restart: unless-stopped