diff --git a/ui/src/type/alert.d.ts b/ui/src/type/alert.d.ts
index 8f944010b..a579eee0c 100644
--- a/ui/src/type/alert.d.ts
+++ b/ui/src/type/alert.d.ts
@@ -24,7 +24,7 @@ declare namespace Alert {
       value?: string;
     }[];
     endsAt: Dayjs;
-    rules:string[];
+    rules: string[];
     id?: string;
     comment: string;
   };