diff --git a/types/index.d.ts b/types/index.d.ts
index 2799cf7..af7d9e9 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -68,6 +68,7 @@ declare module 'fastify' {
 
 declare namespace fastifySensible {
   export interface SensibleOptions {
+    sharedSchemaId?: string;
   }
 
   export const fastifySensible: FastifySensible