diff --git a/typings/index.d.ts b/typings/index.d.ts
index ef776bc..191c7a0 100644
--- a/typings/index.d.ts
+++ b/typings/index.d.ts
@@ -1,6 +1,6 @@
 import { Schema } from 'mongoose';
 
-export declare function updateIfCurrentPlugin(schema: Schema, options?: PluginOptions): void;
+export declare function updateIfCurrentPlugin<T>(schema: Schema<T>, options?: PluginOptions): void;
 
 export declare interface PluginOptions {
   strategy?: 'version' | 'timestamp';