diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index f36acff64..e53b0c190 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -41,9 +41,9 @@
         "lru-cache": "^10.4.3",
         "mime-types": "^2.1.35",
         "moment-timezone": "^0.5.47",
-        "mongodb": "^5.9.2",
+        "mongodb": "^6.15.0",
         "mongodb-uri": "^0.9.7",
-        "nanoid": "^5.1.4",
+        "nanoid": "^5.1.5",
         "nodemailer": "^6.10.0",
         "notp": "^2.0.3",
         "p-queue": "^8.1.0",
diff --git a/packages/hydrooj/src/model/blacklist.ts b/packages/hydrooj/src/model/blacklist.ts
index e02502cca..613284cee 100644
--- a/packages/hydrooj/src/model/blacklist.ts
+++ b/packages/hydrooj/src/model/blacklist.ts
@@ -13,12 +13,11 @@ class BlackListModel {
         else if (typeof expire === 'number') expireAt = moment().add(expire, 'months').toDate();
         else if (expire instanceof Date) expireAt = expire;
         else expireAt = new Date(new Date().getTime() + 365 * 24 * 60 * 60 * 1000);
-        const res = await coll.findOneAndUpdate(
+        return await coll.findOneAndUpdate(
             { _id: id },
             { $set: { expireAt } },
             { upsert: true, returnDocument: 'after' },
         );
-        return res.value;
     }
 
     @ArgMethod
diff --git a/packages/hydrooj/src/model/document.ts b/packages/hydrooj/src/model/document.ts
index e052bd8c9..83f47e6ab 100644
--- a/packages/hydrooj/src/model/document.ts
+++ b/packages/hydrooj/src/model/document.ts
@@ -109,12 +109,11 @@ export async function set<K extends keyof DocType>(
     if ($set) update.$set = $set;
     if ($unset) update.$unset = $unset;
     if ($push) update.$push = $push;
-    const res = await coll.findOneAndUpdate(
+    return await coll.findOneAndUpdate(
         { domainId, docType, docId },
         update,
         { returnDocument: 'after', upsert: true },
     );
-    return res.value;
 }
 
 export function deleteOne<K extends keyof DocType>(
@@ -150,24 +149,22 @@ export async function inc<K extends keyof DocType>(
     domainId: string, docType: K, docId: DocType[K]['docId'],
     key: NumberKeys<DocType[K]>, value: number,
 ) {
-    const res = await coll.findOneAndUpdate(
+    return await coll.findOneAndUpdate(
         { domainId, docType, docId },
         { $inc: { [key]: value } },
         { returnDocument: 'after' },
     );
-    return res.value;
 }
 
 export async function incAndSet<K extends keyof DocType>(
     domainId: string, docType: K, docId: DocType[K]['docId'],
     key: NumberKeys<DocType[K]>, value: number, args: Partial<DocType[K]>,
 ) {
-    const res = await coll.findOneAndUpdate(
+    return await coll.findOneAndUpdate(
         { domainId, docType, docId },
         { $inc: { [key]: value }, $set: args },
         { returnDocument: 'after' },
     );
-    return res.value;
 }
 
 export function count<K extends keyof DocType>(
@@ -211,13 +208,12 @@ export async function pull<K extends keyof DocType, T extends ArrayKeys<DocType[
     domainId: string, docType: K, docId: DocType[K]['docId'],
     setKey: T, contents: Filter<DocType[K][T][0]>,
 ): Promise<DocType[K]> {
-    const res = await coll.findOneAndUpdate(
+    return await coll.findOneAndUpdate(
         { domainId, docType, docId },
         // @ts-ignore
         { $pull: { [setKey]: { $in: contents } } },
         { returnDocument: 'after' },
     );
-    return res.value;
 }
 
 export async function deleteSub<T extends keyof DocType, K extends ArrayKeys<DocType[T]>>(
@@ -225,13 +221,12 @@ export async function deleteSub<T extends keyof DocType, K extends ArrayKeys<Doc
     key: K, subId: MaybeArray<DocType[T][K][0]['_id']>,
 ): Promise<DocType[T]> {
     subId = (subId instanceof Array) ? subId : [subId];
-    const res = await coll.findOneAndUpdate(
+    return await coll.findOneAndUpdate(
         { domainId, docType, docId },
         // @ts-ignore
         { $pull: { [key]: { _id: { $in: subId } } } },
         { returnDocument: 'after' },
     );
-    return res.value;
 }
 
 export async function getSub<T extends keyof DocType, K extends ArrayKeys<DocType[T]>>(
@@ -257,7 +252,7 @@ export async function setSub<T extends keyof DocType, K extends NormalArrayKeys<
 ): Promise<DocType[T]> {
     const $set: Record<string, any> = {};
     for (const k in args) $set[`${key}.$.${k}`] = args[k];
-    const res = await coll.findOneAndUpdate(
+    return await coll.findOneAndUpdate(
         {
             domainId,
             docType,
@@ -267,20 +262,18 @@ export async function setSub<T extends keyof DocType, K extends NormalArrayKeys<
         { $set },
         { returnDocument: 'after' },
     );
-    return res.value;
 }
 
 export async function addToSet<T extends keyof DocType, K extends ArrayKeys<DocType[T], string>>(
     domainId: string, docType: T, docId: DocType[T]['docId'],
     setKey: K, content: string,
 ) {
-    const res = await coll.findOneAndUpdate(
+    return await coll.findOneAndUpdate(
         { domainId, docType, docId },
         // @ts-ignore
         { $addToSet: { [setKey]: content } },
         { returnDocument: 'after' },
     );
-    return res.value;
 }
 
 export async function getStatus<K extends keyof DocStatusType>(
@@ -305,7 +298,7 @@ export async function setStatus<K extends keyof DocStatusType>(
     domainId: string, docType: K, docId: DocStatusType[K]['docId'], uid: number,
     args: UpdateFilter<DocStatusType[K]>['$set'], returnDocument: 'before' | 'after' = 'after',
 ): Promise<DocStatusType[K]> {
-    const res = await collStatus.findOneAndUpdate(
+    return await collStatus.findOneAndUpdate(
         { domainId, docType, docId, uid },
         { $set: args, $inc: { counter: 1 } },
         {
@@ -315,7 +308,6 @@ export async function setStatus<K extends keyof DocStatusType>(
             ...(returnDocument === 'before' ? { readConcern: { level: 'majority' }, readPreference: 'primary' } : {}),
         },
     );
-    return res.value;
 }
 
 export async function setMultiStatus<K extends keyof DocStatusType>(
@@ -333,12 +325,11 @@ export async function setStatusIfNotCondition<T extends keyof DocStatusType>(
     returnDocument: 'before' | 'after' = 'after',
 ): Promise<DocStatusType[T]> {
     try {
-        const res = await collStatus.findOneAndUpdate(
+        return await collStatus.findOneAndUpdate(
             { domainId, docType, docId, uid, $nor: [filter] },
             { $set: args },
             { upsert: true, returnDocument },
         );
-        return res.value;
     } catch (e) {
         return false;
     }
@@ -364,24 +355,22 @@ export async function cappedIncStatus<T extends keyof DocStatusType>(
     const $not = value > 0 ? { $gte: maxValue } : { $lte: minValue };
     const operation = { $inc: { [key]: value } } as UpdateFilter<DocStatusType[T]>;
     if (Object.keys(setPayload).length) operation.$set = setPayload;
-    const res = await collStatus.findOneAndUpdate(
+    return await collStatus.findOneAndUpdate(
         { domainId, docType, docId, uid, [key]: { $not } },
         operation,
         { upsert: true, returnDocument: 'after' },
     );
-    return res.value;
 }
 
 export async function incStatus<T extends keyof DocStatusType>(
     domainId: string, docType: T, docId: DocStatusType[T]['docId'], uid: number,
     key: NumberKeys<DocStatusType[T]>, value: number,
 ): Promise<DocStatusType[T]> {
-    const res = await collStatus.findOneAndUpdate(
+    return await collStatus.findOneAndUpdate(
         { domainId, docType, docId, uid },
         { $inc: { [key]: value } },
         { upsert: true, returnDocument: 'after' },
     );
-    return res.value;
 }
 
 export async function revPushStatus<T extends keyof DocStatusType>(
@@ -393,7 +382,7 @@ export async function revPushStatus<T extends keyof DocStatusType>(
         { $set: { [`${key}.$`]: value }, $inc: { rev: 1 } },
         { returnDocument: 'after' },
     );
-    if (!res.value) {
+    if (!res) {
         res = await collStatus.findOneAndUpdate(
             { domainId, docType, docId, uid },
             // @ts-ignore
@@ -401,18 +390,17 @@ export async function revPushStatus<T extends keyof DocStatusType>(
             { upsert: true, returnDocument: 'after' },
         );
     }
-    return res.value;
+    return res;
 }
 
 export async function revInitStatus<T extends keyof DocStatusType>(
     domainId: string, docType: T, docId: DocStatusType[T]['docId'], uid: number,
 ): Promise<DocStatusType[T]> {
-    const res = await collStatus.findOneAndUpdate(
+    return await collStatus.findOneAndUpdate(
         { domainId, docType, docId, uid },
         { $inc: { rev: 1 } },
         { upsert: true, returnDocument: 'after' },
     );
-    return res.value;
 }
 
 export async function revSetStatus<T extends keyof DocStatusType>(
@@ -421,8 +409,7 @@ export async function revSetStatus<T extends keyof DocStatusType>(
 ): Promise<any> {
     const filter = { domainId, docType, docId, uid, rev };
     const update = { $set: args, $inc: { rev: 1 } };
-    const res = await collStatus.findOneAndUpdate(filter, update, { returnDocument: 'after' });
-    return res.value;
+    return await collStatus.findOneAndUpdate(filter, update, { returnDocument: 'after' });
 }
 
 export async function apply(ctx: Context) {
diff --git a/packages/hydrooj/src/model/domain.ts b/packages/hydrooj/src/model/domain.ts
index 48c493c2b..bca9fa9e3 100644
--- a/packages/hydrooj/src/model/domain.ts
+++ b/packages/hydrooj/src/model/domain.ts
@@ -101,23 +101,23 @@ class DomainModel {
         domainId = domainId.toLowerCase();
         await bus.parallel('domain/before-update', domainId, $set);
         const result = await coll.findOneAndUpdate({ lower: domainId }, { $set }, { returnDocument: 'after' });
-        if (result.value) {
-            await bus.parallel('domain/update', domainId, $set, result.value);
+        if (result) {
+            await bus.parallel('domain/update', domainId, $set, result);
             bus.broadcast('domain/delete-cache', domainId);
         }
-        return result.value;
+        return result;
     }
 
     @ArgMethod
     static async inc(domainId: string, field: NumberKeys<DomainDoc>, n: number): Promise<number | null> {
         domainId = domainId.toLowerCase();
-        const res = await coll.findOneAndUpdate(
+        const value = await coll.findOneAndUpdate(
             { _id: domainId },
             { $inc: { [field]: n } as any },
             { returnDocument: 'after' },
         );
         bus.broadcast('domain/delete-cache', domainId);
-        return res.value?.[field];
+        return value?.[field];
     }
 
     @ArgMethod
@@ -136,7 +136,7 @@ class DomainModel {
     static async setUserRole(domainId: string, uid: MaybeArray<number>, role: string, autojoin = false) {
         const update = { $set: { role, ...(autojoin ? { join: true } : {}) } };
         if (!(uid instanceof Array)) {
-            const res = await collUser.findOneAndUpdate({ domainId, uid }, update, { upsert: true, returnDocument: 'after' });
+            const res = await collUser.findOneAndUpdate({ domainId, uid }, update, { upsert: true, returnDocument: 'after', includeResultMetadata: true });
             const udoc = await UserModel.getById(domainId, uid);
             deleteUserCache(udoc);
             return res;
diff --git a/packages/hydrooj/src/model/message.ts b/packages/hydrooj/src/model/message.ts
index e93f6d4fa..df96a1e86 100644
--- a/packages/hydrooj/src/model/message.ts
+++ b/packages/hydrooj/src/model/message.ts
@@ -55,12 +55,11 @@ class MessageModel {
     }
 
     static async setFlag(messageId: ObjectId, flag: number) {
-        const result = await MessageModel.coll.findOneAndUpdate(
+        return await MessageModel.coll.findOneAndUpdate(
             { _id: messageId },
             { $bit: { flag: { xor: flag } } },
             { returnDocument: 'after' },
         );
-        return result.value || null;
     }
 
     static async del(_id: ObjectId) {
diff --git a/packages/hydrooj/src/model/oauth.ts b/packages/hydrooj/src/model/oauth.ts
index 93ddb4964..34225aa8e 100644
--- a/packages/hydrooj/src/model/oauth.ts
+++ b/packages/hydrooj/src/model/oauth.ts
@@ -15,7 +15,7 @@ class OauthModel {
             { $set: { uid } },
             { upsert: true, returnDocument: 'after' },
         );
-        return res.value?.uid;
+        return res?.uid;
     }
 }
 
diff --git a/packages/hydrooj/src/model/opcount.ts b/packages/hydrooj/src/model/opcount.ts
index 983e53d71..53f229e21 100644
--- a/packages/hydrooj/src/model/opcount.ts
+++ b/packages/hydrooj/src/model/opcount.ts
@@ -13,7 +13,7 @@ export async function inc(op: string, ident: string, periodSecs: number, maxOper
             expireAt,
             opcount: { $lt: maxOperations },
         }, { $inc: { opcount: 1 } }, { upsert: true, returnDocument: 'after' });
-        return res.value.opcount;
+        return res.opcount;
     } catch (e) {
         if (e.message.includes('duplicate')) throw new OpcountExceededError(op, periodSecs, maxOperations);
         throw e;
diff --git a/packages/hydrooj/src/model/record.ts b/packages/hydrooj/src/model/record.ts
index 2d3196f2f..c12451625 100644
--- a/packages/hydrooj/src/model/record.ts
+++ b/packages/hydrooj/src/model/record.ts
@@ -209,12 +209,11 @@ export default class RecordModel {
             return null;
         }
         if (Object.keys($update).length) {
-            const res = await RecordModel.coll.findOneAndUpdate(
+            return await RecordModel.coll.findOneAndUpdate(
                 { _id, domainId },
                 $update,
                 { returnDocument: 'after' },
             );
-            return res.value || null;
         }
         return await RecordModel.coll.findOne({ _id }, { readPreference: 'primary' });
     }
diff --git a/packages/hydrooj/src/model/schedule.ts b/packages/hydrooj/src/model/schedule.ts
index dbe070d32..107ab09b0 100644
--- a/packages/hydrooj/src/model/schedule.ts
+++ b/packages/hydrooj/src/model/schedule.ts
@@ -15,13 +15,13 @@ async function getFirst(query: Filter<Schedule>) {
     const q = { ...query };
     q.executeAfter ||= { $lt: new Date() };
     const res = await coll.findOneAndDelete(q);
-    if (res.value) {
-        logger.debug('%o', res.value);
-        if (res.value.interval) {
-            const executeAfter = moment(res.value.executeAfter).add(...res.value.interval).toDate();
-            await coll.insertOne({ ...res.value, executeAfter });
+    if (res) {
+        logger.debug('%o', res);
+        if (res.interval) {
+            const executeAfter = moment(res.executeAfter).add(...res.interval).toDate();
+            await coll.insertOne({ ...res, executeAfter });
         }
-        return res.value;
+        return res;
     }
     return null;
 }
diff --git a/packages/hydrooj/src/model/storage.ts b/packages/hydrooj/src/model/storage.ts
index 18c7fc6be..a583fe8db 100644
--- a/packages/hydrooj/src/model/storage.ts
+++ b/packages/hydrooj/src/model/storage.ts
@@ -35,7 +35,7 @@ export class StorageModel {
     }
 
     static async get(path: string, savePath?: string) {
-        const { value } = await StorageModel.coll.findOneAndUpdate(
+        const value = await StorageModel.coll.findOneAndUpdate(
             { path, autoDelete: null },
             { $set: { lastUsage: new Date() } },
             { returnDocument: 'after' },
@@ -101,7 +101,7 @@ export class StorageModel {
     }
 
     static async getMeta(path: string) {
-        const { value } = await StorageModel.coll.findOneAndUpdate(
+        const value = await StorageModel.coll.findOneAndUpdate(
             { path, autoDelete: null },
             { $set: { lastUsage: new Date() } },
             { returnDocument: 'after' },
@@ -120,7 +120,7 @@ export class StorageModel {
             { path: target, autoDelete: null },
             { $set: { lastUsage: new Date() } },
         );
-        return await storage.signDownloadLink(res.value?.link || res.value?._id || target, filename, noExpire, useAlternativeEndpointFor);
+        return await storage.signDownloadLink(res?.link || res?._id || target, filename, noExpire, useAlternativeEndpointFor);
     }
 
     static async move(src: string, dst: string) {
@@ -128,7 +128,7 @@ export class StorageModel {
             { path: src, autoDelete: null },
             { $set: { path: dst } },
         );
-        return !!res.value;
+        return !!res;
     }
 
     static async exists(path: string) {
@@ -137,7 +137,7 @@ export class StorageModel {
     }
 
     static async copy(src: string, dst: string) {
-        const { value } = await StorageModel.coll.findOneAndUpdate(
+        const value = await StorageModel.coll.findOneAndUpdate(
             { path: src, autoDelete: null },
             { $set: { lastUsage: new Date() } },
             { returnDocument: 'after' },
@@ -170,9 +170,9 @@ async function cleanFiles() {
     }
     if (system.get('server.keepFiles')) return;
     let res = await StorageModel.coll.findOneAndDelete({ autoDelete: { $lte: new Date() } });
-    while (res.value) {
+    while (res) {
         // eslint-disable-next-line no-await-in-loop
-        if (!res.value.link) await storage.del(res.value._id);
+        if (!res.link) await storage.del(res._id);
         // eslint-disable-next-line no-await-in-loop
         res = await StorageModel.coll.findOneAndDelete({ autoDelete: { $lte: new Date() } });
     }
diff --git a/packages/hydrooj/src/model/system.ts b/packages/hydrooj/src/model/system.ts
index 8eaaa6be9..735c2e955 100644
--- a/packages/hydrooj/src/model/system.ts
+++ b/packages/hydrooj/src/model/system.ts
@@ -45,8 +45,8 @@ export async function set(_id: string, value: any, broadcast = true) {
         { $set: { value } },
         { upsert: true, returnDocument: 'after' },
     );
-    cache[_id] = res.value.value;
-    return res.value.value;
+    cache[_id] = res.value;
+    return res.value;
 }
 
 export async function inc<K extends NumberKeys<SystemKeys>>(_id: K) {
@@ -55,8 +55,8 @@ export async function inc<K extends NumberKeys<SystemKeys>>(_id: K) {
         { $inc: { value: 1 } as any },
         { upsert: true, returnDocument: 'after' },
     );
-    cache[_id] = res.value.value;
-    return res.value.value;
+    cache[_id] = res.value;
+    return res.value;
 }
 
 export async function runConfig() {
diff --git a/packages/hydrooj/src/model/task.ts b/packages/hydrooj/src/model/task.ts
index 1ab22c4c5..57df43213 100644
--- a/packages/hydrooj/src/model/task.ts
+++ b/packages/hydrooj/src/model/task.ts
@@ -19,9 +19,9 @@ async function getFirst(query: Filter<Task>) {
     try {
         const q = { ...query };
         const res = await coll.findOneAndDelete(q, { sort: { priority: -1 } });
-        if (res.value) {
-            logger.debug('%o', res.value);
-            return res.value;
+        if (res) {
+            logger.debug('%o', res);
+            return res;
         }
         return null;
     } catch (e) {
@@ -182,9 +182,9 @@ export async function apply(ctx: Context) {
                 logger.error(e);
                 continue;
             }
-            if (argv.options.showEvent) logger.info('Event: %o', res.value);
+            if (argv.options.showEvent) logger.info('Event: %o', res);
             // eslint-disable-next-line no-await-in-loop
-            await (res.value ? handleEvent(res.value) : sleep(500));
+            await (res ? handleEvent(res) : sleep(500));
         }
     });
     await db.ensureIndexes(collEvent, { name: 'expire', key: { expire: 1 }, expireAfterSeconds: 0 });
diff --git a/packages/hydrooj/src/model/token.ts b/packages/hydrooj/src/model/token.ts
index 9dd9b8841..6223ca193 100644
--- a/packages/hydrooj/src/model/token.ts
+++ b/packages/hydrooj/src/model/token.ts
@@ -67,7 +67,7 @@ class TokenModel {
             },
             { returnDocument: 'after' },
         );
-        return res.value;
+        return res;
     }
 
     @ArgMethod
diff --git a/packages/hydrooj/src/model/user.ts b/packages/hydrooj/src/model/user.ts
index fc31585d2..6f39bc238 100644
--- a/packages/hydrooj/src/model/user.ts
+++ b/packages/hydrooj/src/model/user.ts
@@ -268,7 +268,7 @@ class UserModel {
             deleteUserCache(udoc);
         }
         const res = await coll.findOneAndUpdate({ _id: uid }, op, { returnDocument: 'after' });
-        deleteUserCache(res.value);
+        deleteUserCache(res);
         return res;
     }
 
@@ -290,8 +290,8 @@ class UserModel {
             { $set: { salt, hash: await pwhash(password, salt), hashType: 'hydro' } },
             { returnDocument: 'after' },
         );
-        deleteUserCache(res.value);
-        return res.value;
+        deleteUserCache(res);
+        return res;
     }
 
     @ArgMethod
@@ -427,8 +427,8 @@ class UserModel {
             { $set: { priv } },
             { returnDocument: 'after' },
         );
-        deleteUserCache(res.value);
-        return res.value;
+        deleteUserCache(res);
+        return res;
     }
 
     @ArgMethod
diff --git a/packages/hydrooj/src/service/worker.ts b/packages/hydrooj/src/service/worker.ts
index cffad83d0..192e522b4 100644
--- a/packages/hydrooj/src/service/worker.ts
+++ b/packages/hydrooj/src/service/worker.ts
@@ -29,13 +29,13 @@ export class WorkerService extends Service {
             subType: { $in: Object.keys(this.handlers) },
         };
         const res = await this.coll.findOneAndDelete(q);
-        if (res.value) {
-            this.ctx.logger.debug('%o', res.value);
-            if (res.value.interval) {
-                const executeAfter = moment(res.value.executeAfter).add(...res.value.interval).toDate();
-                await this.coll.insertOne({ ...res.value, executeAfter });
+        if (res) {
+            this.ctx.logger.debug('%o', res);
+            if (res.interval) {
+                const executeAfter = moment(res.executeAfter).add(...res.interval).toDate();
+                await this.coll.insertOne({ ...res, executeAfter });
             }
-            return res.value;
+            return res;
         }
         return null;
     }
diff --git a/packages/migrate/package.json b/packages/migrate/package.json
index 0d138687b..38139ebd1 100644
--- a/packages/migrate/package.json
+++ b/packages/migrate/package.json
@@ -7,7 +7,7 @@
     "license": "AGPL-3.0-or-later",
     "dependencies": {
         "mariadb": "^3.4.0",
-        "mongodb": "^5.9.2",
+        "mongodb": "^6.15.0",
         "turndown": "^7.2.0",
         "xml2js": "^0.6.2"
     },
diff --git a/packages/utils/package.json b/packages/utils/package.json
index c53beb552..06d5aa8a2 100644
--- a/packages/utils/package.json
+++ b/packages/utils/package.json
@@ -13,7 +13,7 @@
         "fs-extra": "^11.3.0",
         "js-yaml": "^4.1.0",
         "moment-timezone": "^0.5.47",
-        "mongodb": "^5.9.2",
+        "mongodb": "^6.15.0",
         "reggol": "^2.1.0",
         "search-query-parser": "^1.6.0",
         "systeminformation": "^5.25.11"