diff --git a/packages/plugins/plugin-cert/src/plugin/cert-plugin/cert-reader.ts b/packages/plugins/plugin-cert/src/plugin/cert-plugin/cert-reader.ts
index 02f37014a..2fae4ad7d 100644
--- a/packages/plugins/plugin-cert/src/plugin/cert-plugin/cert-reader.ts
+++ b/packages/plugins/plugin-cert/src/plugin/cert-plugin/cert-reader.ts
@@ -57,7 +57,7 @@ export class CertReader {
     if (ic == null) {
       return "";
     }
-    return ic.trim();
+    return ic?.trim();
   }
 
   getOc() {
diff --git a/packages/ui/certd-server/src/plugins/plugin-namesilo/dns-provider.ts b/packages/ui/certd-server/src/plugins/plugin-namesilo/dns-provider.ts
index 99812523d..de7b7dc54 100644
--- a/packages/ui/certd-server/src/plugins/plugin-namesilo/dns-provider.ts
+++ b/packages/ui/certd-server/src/plugins/plugin-namesilo/dns-provider.ts
@@ -70,7 +70,7 @@ export class NamesiloDnsProvider extends AbstractDnsProvider<NamesiloRecord> {
       rrtype: type,
       rrhost: hostRecord,
       rrvalue: value,
-      rrttl: 10,
+      rrttl: 3600,
     });
 
     //本接口需要返回本次创建的dns解析记录，这个记录会在删除的时候用到