diff --git a/src/db/migrations/0003.sql b/src/db/migrations/0003.sql
index 285a8f5..b9734ee 100644
--- a/src/db/migrations/0003.sql
+++ b/src/db/migrations/0003.sql
@@ -6,6 +6,6 @@ ALTER SCHEMA admin RENAME TO xssbook;
 -- Migration End;
 
 -- Set Current Revision
-UPDATE sys.database_info SET curr_revision = 3 WHERE name = current_database();
+UPDATE sys.database_info SET curr_revision = 4 WHERE name = current_database();
 
 COMMIT TRANSACTION;
diff --git a/src/db/migrations/0004.sql b/src/db/migrations/0004.sql
new file mode 100644
index 0000000..addf0fc
--- /dev/null
+++ b/src/db/migrations/0004.sql
@@ -0,0 +1,16 @@
+BEGIN TRANSACTION;
+SET search_path = public;
+
+-- Migration Start
+CREATE TYPE xssbook.lang_type AS ENUM (
+	'en_US'
+);
+
+ALTER TABLE xssbook.user
+	ADD COLUMN lang xssbook.lang_type DEFAULT 'en_US' NOT NULL;
+-- Migration End;
+
+-- Set Current Revision
+UPDATE sys.database_info SET curr_revision = 5 WHERE name = current_database();
+
+COMMIT TRANSACTION;
diff --git a/src/db/rest/util/api_root.sql b/src/db/rest/util/api_root.sql
deleted file mode 100644
index 7141a5f..0000000
--- a/src/db/rest/util/api_root.sql
+++ /dev/null
@@ -1,19 +0,0 @@
-
-CREATE FUNCTION FUNCTION _api.root()
-RETURNS JSON
-LANGUAGE plpgsql;
-AS $BODY$
-DECLARE
-openapi JSON = $$
-  {
-    "swagger": "2.0",
-    "info": {
-      "title": "XSSBook",
-      "description": "XSSBook Api Documentation"
-    }
-  }
-$$;
-BEGIN
-	RETURN openapi;
-END
-$BODY$;