diff --git a/aula205/main.py b/aula205/main.py
index 67c1932..2a026aa 100644
--- a/aula205/main.py
+++ b/aula205/main.py
@@ -30,14 +30,15 @@ cursor.execute(
 connection.commit()
 
 # Registrar valores nas colunas da tabela
-# CUIDADO: sql injection
-cursor.execute(
+sql = (
     f'INSERT INTO {TABLE_NAME} '
-    '(id, name, weight) '
+    '(name, weight) '
     'VALUES '
-    '(NULL, "Helena", 4), (NULL, "Eduardo", 10)'
+    '(?, ?)'
 )
+cursor.execute(sql, ['Joana', 4])
 connection.commit()
+print(sql)
 
 cursor.close()
 connection.close()