diff --git a/tools/migration/changelog.md b/tools/migration/changelog.md
index ac279b560..20ea6d8e2 100644
--- a/tools/migration/changelog.md
+++ b/tools/migration/changelog.md
@@ -44,4 +44,5 @@ Changelog for harbor database schema
   - delete column `user_id` from table `access_log`
   - delete foreign key (user_id) references user(user_id)from table `access_log`
   - delete foreign key (project_id) references project(project_id)from table `access_log`
-  - add column `username` varchar (32) to table `access_log`
\ No newline at end of file
+  - add column `username` varchar (32) to table `access_log`
+  - alter column `realname` on table `user`: varchar(20)->varchar(255)
\ No newline at end of file
diff --git a/tools/migration/migration_harbor/versions/1_2_0.py b/tools/migration/migration_harbor/versions/1_2_0.py
index 05c712f1d..5c41509fd 100644
--- a/tools/migration/migration_harbor/versions/1_2_0.py
+++ b/tools/migration/migration_harbor/versions/1_2_0.py
@@ -38,6 +38,8 @@ def upgrade():
     """
     bind = op.get_bind()
     session = Session(bind=bind)
+	
+    op.alter_column('user', 'realname', type_=sa.String(255), existing_type=sa.String(20))
 
     #delete column access_log.user_id(access_log_ibfk_1), access_log.project_id(access_log_ibfk_2)
     op.drop_constraint('access_log_ibfk_1', 'access_log', type_='foreignkey')