diff --git a/postgresql.md b/postgresql.md
index 08c1ff5..8a2ce74 100644
--- a/postgresql.md
+++ b/postgresql.md
@@ -16,7 +16,7 @@ docker network create pgsql_net
 ```
 
 ```shell
-docker build -t iut/pgsql:2025-13 \ -f postgresql.Dockerfile . 
+docker build -t iut/pgsql:2025-13 -f postgresql.Dockerfile . 
 ```
 
 ```shell