diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index 9a63e8b74..1f2e6db71 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -63,7 +63,6 @@
         "@types/koa-router": "^7.4.4",
         "@types/koa-static-cache": "^5.1.1",
         "@types/lodash": "^4.14.184",
-        "@types/lru-cache": "^7.10.10",
         "@types/mime-types": "^2.1.1",
         "@types/minio": "^7.0.13",
         "@types/mongodb": "^3.6.20",
diff --git a/packages/hydrooj/src/context.ts b/packages/hydrooj/src/context.ts
index 2f67cd6cc..20462eccf 100644
--- a/packages/hydrooj/src/context.ts
+++ b/packages/hydrooj/src/context.ts
@@ -21,7 +21,6 @@ function provideModule<T extends keyof ModuleInterfaces>(type: T, id: string, mo
 
 export interface Context {
     [Context.events]: Events<this>;
-    options: Context.Config;
     loader: Loader;
     Route: typeof import('./service/server').Route;
     Connection: typeof import('./service/server').Connection;
diff --git a/packages/hydrooj/src/interface.ts b/packages/hydrooj/src/interface.ts
index 994cf0389..ca132dbfe 100644
--- a/packages/hydrooj/src/interface.ts
+++ b/packages/hydrooj/src/interface.ts
@@ -246,7 +246,7 @@ declare module './model/problem' {
 export type { ProblemDoc } from './model/problem';
 export type ProblemDict = NumericDictionary<ProblemDoc>;
 
-export interface StatusDoc {
+export interface StatusDocBase {
     _id: ObjectID,
     docId: any,
     docType: number,
@@ -254,7 +254,7 @@ export interface StatusDoc {
     uid: number,
 }
 
-export interface ProblemStatusDoc extends StatusDoc {
+export interface ProblemStatusDoc extends StatusDocBase {
     docId: number;
     docType: 10;
     rid?: ObjectID;
@@ -609,14 +609,12 @@ export interface OauthMap {
 
 export interface Collections {
     'blacklist': BlacklistDoc;
-    'contest': Tdoc;
     'domain': DomainDoc;
     'domain.user': any;
     'domain.union': DomainUnion;
     'record': RecordDoc;
     'document': any;
-    'document.status': any;
-    'problem': ProblemDoc;
+    'document.status': StatusDocBase;
     'user': Udoc;
     'user.preference': UserPreferenceDoc;
     'vuser': VUdoc;
@@ -632,9 +630,6 @@ export interface Collections {
     'oplog': OplogDoc;
     'event': EventDoc;
     'opcount': OpCountDoc;
-    'log': any;
-    'fs.chunks': any;
-    'fs.files': any;
 }
 
 export interface Model {
diff --git a/packages/hydrooj/src/model/contest.ts b/packages/hydrooj/src/model/contest.ts
index ce4fc29af..31885eba1 100644
--- a/packages/hydrooj/src/model/contest.ts
+++ b/packages/hydrooj/src/model/contest.ts
@@ -179,7 +179,7 @@ const acm = buildContestRule({
             { $match: { 'detail.status': STATUS.STATUS_ACCEPTED } },
             { $sort: { 'detail.rid': 1 } },
             { $group: { _id: '$detail.pid', first: { $first: '$detail.rid' } } },
-        ]).toArray();
+        ]).toArray() as any[];
         for (const t of data) first[t._id] = t.first.generationTime;
 
         const columns = await this.scoreboardHeader(isExport, _, tdoc, pdict);
diff --git a/packages/hydrooj/src/model/document.ts b/packages/hydrooj/src/model/document.ts
index 07dd0a2d1..0de018e4f 100644
--- a/packages/hydrooj/src/model/document.ts
+++ b/packages/hydrooj/src/model/document.ts
@@ -306,7 +306,7 @@ export async function setIfNotStatus<T extends keyof DocStatusType, K extends ke
     domainId: string, docType: T, docId: DocStatusType[T]['docId'], uid: number,
     key: K, value: DocStatusType[T][K], ifNot: DocStatusType[T][K], args: Partial<DocStatusType[T]>,
 ): Promise<DocStatusType[T]> {
-    const current = await collStatus.findOne({ domainId, docType, docId, uid }) || {};
+    const current: Partial<DocStatusType[T]> = await collStatus.findOne({ domainId, docType, docId, uid }) || {};
     if (typeof key === 'string' && key.includes('.')) {
         const acc = key.split('.');
         let c = current;
diff --git a/packages/hydrooj/src/model/user.ts b/packages/hydrooj/src/model/user.ts
index b650c5710..f2a9484b4 100644
--- a/packages/hydrooj/src/model/user.ts
+++ b/packages/hydrooj/src/model/user.ts
@@ -1,6 +1,6 @@
 import { escapeRegExp, pick, uniq } from 'lodash';
 import LRU from 'lru-cache';
-import { Collection, ObjectID } from 'mongodb';
+import { Collection, FilterQuery, ObjectID } from 'mongodb';
 import { LoginError, UserAlreadyExistError, UserNotFoundError } from '../error';
 import {
     FileInfo, GDoc, ownerInfo,
@@ -336,7 +336,7 @@ class UserModel {
         return uid;
     }
 
-    static getMulti(params: any = {}) {
+    static getMulti(params: FilterQuery<Udoc> = {}) {
         return coll.find(params);
     }