diff --git a/index.d.ts b/index.d.ts
index 1dbf24df55..f4892c2a56 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -516,7 +516,7 @@ declare module 'egg' {
       };
       xframe: {
         enable: boolean;
-        value: 'SAMEORIGIN' | 'DENY' | 'ALLOW-FROM';
+        value: 'SAMEORIGIN' | 'DENY' | `ALLOW-FROM ${string}`;
       };
       hsts: any;
       methodnoallow: { enable: boolean };