diff --git a/.env.example b/.env.example
index 393d708..b06dc5d 100644
--- a/.env.example
+++ b/.env.example
@@ -3,6 +3,7 @@ POSTGRES_SOURCE=postgres://postgres:postgres@0.0.0.0:5432/realworld?sslmode=disa
 POSTGRES_MIGRATION_URL=file://internal/adapter/repository/sql/db/migration
 MONGO_SOURCE=mongodb://root:root@0.0.0.0:27017/realworld?authSource=admin
 LOG_TYPE=zerolog
+DB_TYPE=postgres
 SERVER_TYPE=restful
 SERVER_PORT=5000
 TOKEN_SYMMETRIC_KEY=12345678901234567890123456789012
\ No newline at end of file