diff --git a/lib/plugins/generator/asset.ts b/lib/plugins/generator/asset.ts
index 336c4e2612..70fde55d8c 100644
--- a/lib/plugins/generator/asset.ts
+++ b/lib/plugins/generator/asset.ts
@@ -3,9 +3,9 @@ import { exists, createReadStream } from 'hexo-fs';
 import Promise from 'bluebird';
 import { extname } from 'path';
 import { magenta } from 'picocolors';
-import type warehouse from 'warehouse';
 import type Hexo from '../../hexo';
-import type { AssetGenerator } from '../../types';
+import type { AssetGenerator, AssetSchema } from '../../types';
+import type Document from 'warehouse/dist/document';
 
 interface Data {
   modified: boolean;
@@ -13,21 +13,15 @@ interface Data {
 }
 
 const process = (name: string, ctx: Hexo) => {
-  // @ts-expect-error
-  return Promise.filter(ctx.model(name).toArray(), (asset: warehouse['Schema']) => exists(asset.source).tap(exist => {
-    // @ts-expect-error
+  return Promise.filter(ctx.model(name).toArray(), (asset: Document<AssetSchema>) => exists(asset.source).tap(exist => {
     if (!exist) return asset.remove();
-  })).map((asset: warehouse['Schema']) => {
-    // @ts-expect-error
+  })).map((asset: Document<AssetSchema>) => {
     const { source } = asset;
-    // @ts-expect-error
     let { path } = asset;
     const data: Data = {
-      // @ts-expect-error
       modified: asset.modified
     };
 
-    // @ts-expect-error
     if (asset.renderable && ctx.render.isRenderable(path)) {
       // Replace extension name if the asset is renderable
       const filename = path.substring(0, path.length - extname(path).length);
diff --git a/lib/types.ts b/lib/types.ts
index 2e8f1a052a..162585c8b0 100644
--- a/lib/types.ts
+++ b/lib/types.ts
@@ -131,6 +131,15 @@ export interface TagSchema {
   _id?: string | number;
   name?: string;
 }
+
+export interface AssetSchema {
+  _id?: string;
+  path: string;
+  modified: boolean;
+  renderable: boolean;
+  source: string;
+}
+
 export interface LocalsType {
   page: PostSchema | PageSchema;
   path: string;