diff --git a/build.sh b/build.sh
index 787d2d5..778403e 100755
--- a/build.sh
+++ b/build.sh
@@ -183,6 +183,12 @@ echo "  Database '$DB_NAME' created."
 mysql -h "$DB_HOST" -P "$DB_PORT" -u "$DB_USER" -p"$DB_PASS" "$DB_NAME" < "$APP_DIR/integrated_crm_app_schema.sql"
 echo "  Schema imported."
 
+# Fix permission table column lengths (rbac xlsx may define shorter lengths)
+mysql -h "$DB_HOST" -P "$DB_PORT" -u "$DB_USER" -p"$DB_PASS" "$DB_NAME" <<EOSQL
+ALTER TABLE permission MODIFY COLUMN permtype VARCHAR(255) COMMENT '权限类型';
+EOSQL
+echo "  Permission table columns fixed."
+
 # Generate config.json with encrypted password
 python3 <<PYEOF
 import sys, json