diff --git a/sql/migrations/4.sql b/sql/migrations/4.sql
new file mode 100644
index 0000000000000000000000000000000000000000..e1aaaab38332dd220246fe454cbe9af1f805daa2
--- /dev/null
+++ b/sql/migrations/4.sql
@@ -0,0 +1,2 @@
+ALTER TABLE rooms add username varchar(100) DEFAULT "";
+REPLACE INTO app_info (db_ver) VALUES(4);