diff --git a/packages/prisma/zod-utils.ts b/packages/prisma/zod-utils.ts
index 5feb5e3970..c3d8cf5922 100644
--- a/packages/prisma/zod-utils.ts
+++ b/packages/prisma/zod-utils.ts
@@ -206,7 +206,8 @@ export const stringOrNumber = z.union([
 ]);
 
 export const stringToDayjs = z.string().transform((val) => {
-  const timezone = val.match(/([+-]\d{2}:\d{2})$/)[1] || "+00:00";
+  const matches = val.match(/([+-]\d{2}:\d{2})$/)[1];
+  const timezone = matches ? matches[1] : "+00:00";
   return dayjs(val).utcOffset(timezone);
 });