diff --git a/app/sql/install.sql b/app/sql/install.sql
index f5ea65a..da5f7c5 100644
--- a/app/sql/install.sql
+++ b/app/sql/install.sql
@@ -163,7 +163,7 @@ CREATE TABLE `dnsmgr_cert_order` (
   `processid` varchar(32) DEFAULT NULL,
   `issuetime` datetime DEFAULT NULL,
   `expiretime` datetime DEFAULT NULL,
-  `issuer` varchar(100) NOT NULL,
+  `issuer` varchar(100) DEFAULT NULL,
   `status` tinyint(1) NOT NULL DEFAULT '0',
   `error` varchar(300) DEFAULT NULL,
   `isauto` tinyint(1) NOT NULL DEFAULT '0',
diff --git a/app/sql/update.sql b/app/sql/update.sql
index b362ed2..cd3e3d9 100644
--- a/app/sql/update.sql
+++ b/app/sql/update.sql
@@ -93,7 +93,7 @@ CREATE TABLE IF NOT EXISTS `dnsmgr_cert_order` (
   `processid` varchar(32) DEFAULT NULL,
   `issuetime` datetime DEFAULT NULL,
   `expiretime` datetime DEFAULT NULL,
-  `issuer` varchar(100) NOT NULL,
+  `issuer` varchar(100) DEFAULT NULL,
   `status` tinyint(1) NOT NULL DEFAULT '0',
   `error` varchar(300) DEFAULT NULL,
   `isauto` tinyint(1) NOT NULL DEFAULT '0',