diff --git a/pandora/app/monkey_patch.py b/pandora/app/monkey_patch.py
index b106e224..8f48af00 100644
--- a/pandora/app/monkey_patch.py
+++ b/pandora/app/monkey_patch.py
@@ -32,4 +32,19 @@ def monkey_patch_username():
         if isinstance(v, MaxLengthValidator):
             v.limit_value = 255
 
+def apply_patch():
+    from django.db import connection, transaction
+    cursor = connection.cursor()
+    table = connection.introspection.get_table_description(cursor, User._meta.db_table)
+    sql = []
+    for row in table:
+        if row.name in NEW_LENGTH and row.internal_size != NEW_LENGTH[row.name]:
+            sql.append('ALTER TABLE "%s" ALTER "%s" TYPE varchar(%d)' % (User._meta.db_table, row.name, NEW_LENGTH[row.name]))
+
+    for q in sql:
+        cursor.execute(q)
+    if sql:
+        transaction.commit()
+
+
 monkey_patch_username()
diff --git a/pandora/item/management/commands/sqlfindindex.py b/pandora/item/management/commands/sqlfindindex.py
index c651e18f..3ecba6a8 100644
--- a/pandora/item/management/commands/sqlfindindex.py
+++ b/pandora/item/management/commands/sqlfindindex.py
@@ -31,6 +31,8 @@ class Command(BaseCommand):
                 print(sql)
             cursor.execute(sql)
 
+        app.monkey_patch.apply_patch()
+
         if settings.DB_GIN_TRGM:
             import entity.models
             import document.models