diff --git a/account/migrations/0009_remove_user_tfa_token_remove_user_two_factor_auth.py b/account/migrations/0009_remove_user_tfa_token_remove_user_two_factor_auth.py
new file mode 100644
index 0000000..82ae026
--- /dev/null
+++ b/account/migrations/0009_remove_user_tfa_token_remove_user_two_factor_auth.py
@@ -0,0 +1,21 @@
+# Generated by Django 6.0.4 on 2026-08-06 04:22
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('account', '0008_remove_userprofile_oi_problems_status_and_more'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='user',
+            name='tfa_token',
+        ),
+        migrations.RemoveField(
+            model_name='user',
+            name='two_factor_auth',
+        ),
+    ]
diff --git a/account/models.py b/account/models.py
index 35ecf07..ef7d3a9 100644
--- a/account/models.py
+++ b/account/models.py
@@ -40,8 +40,6 @@ class User(AbstractBaseUser):
     reset_password_token_expire_time = models.DateTimeField(null=True)
     # SSO auth token
     auth_token = models.TextField(null=True)
-    two_factor_auth = models.BooleanField(default=False, db_default=False)
-    tfa_token = models.TextField(null=True)
     session_keys = JSONField(default=list, db_default=models.Value([], output_field=models.JSONField()))
     # open api key
     open_api = models.BooleanField(default=False, db_default=False)
diff --git a/account/serializers.py b/account/serializers.py
index 05b7560..7e3a221 100644
--- a/account/serializers.py
+++ b/account/serializers.py
@@ -8,7 +8,6 @@ from .models import AdminType, ProblemPermission, User, UserProfile
 class UserLoginSerializer(serializers.Serializer):
     username = serializers.CharField()
     password = serializers.CharField()
-    tfa_code = serializers.CharField(required=False, allow_blank=True)
 
 
 class UsernameOrEmailCheckSerializer(serializers.Serializer):
@@ -26,13 +25,11 @@ class UserRegisterSerializer(serializers.Serializer):
 class UserChangePasswordSerializer(serializers.Serializer):
     old_password = serializers.CharField()
     new_password = serializers.CharField(min_length=6)
-    tfa_code = serializers.CharField(required=False, allow_blank=True)
 
 
 class UserChangeEmailSerializer(serializers.Serializer):
     password = serializers.CharField()
     new_email = serializers.EmailField(max_length=64)
-    tfa_code = serializers.CharField(required=False, allow_blank=True)
 
 
 class GenerateUserSerializer(serializers.Serializer):
@@ -61,7 +58,6 @@ class UserAdminSerializer(serializers.ModelSerializer):
             "real_name",
             "create_time",
             "last_login",
-            "two_factor_auth",
             "open_api",
             "is_disabled",
             "raw_password",
@@ -89,7 +85,6 @@ class UserSerializer(serializers.ModelSerializer):
             "problem_permission",
             "create_time",
             "last_login",
-            "two_factor_auth",
             "open_api",
             "is_disabled",
             "class_name",
@@ -121,7 +116,6 @@ class EditUserSerializer(serializers.Serializer):
     admin_type = serializers.ChoiceField(choices=AdminType.choices)
     problem_permission = serializers.ChoiceField(choices=ProblemPermission.choices)
     open_api = serializers.BooleanField()
-    two_factor_auth = serializers.BooleanField()
     is_disabled = serializers.BooleanField()
     class_name = serializers.CharField(required=False, allow_null=True, allow_blank=True)
 
@@ -152,10 +146,6 @@ class SSOSerializer(serializers.Serializer):
     token = serializers.CharField()
 
 
-class TwoFactorAuthCodeSerializer(serializers.Serializer):
-    code = serializers.IntegerField()
-
-
 class ImageUploadForm(forms.Form):
     image = forms.FileField()
 
diff --git a/account/urls/oj.py b/account/urls/oj.py
index f767d70..5b77b95 100644
--- a/account/urls/oj.py
+++ b/account/urls/oj.py
@@ -6,13 +6,11 @@ from ..views.oj import (
     SSOAPI,
     ApplyResetPasswordAPI,
     AvatarUploadAPI,
-    CheckTFARequiredAPI,
     Metrics,
     OpenAPIAppkeyAPI,
     ProfileProblemDisplayIDRefreshAPI,
     ResetPasswordAPI,
     SessionManagementAPI,
-    TwoFactorAuthAPI,
     UserActivityRankAPI,
     UserChangeEmailAPI,
     UserChangePasswordAPI,
@@ -39,11 +37,6 @@ urlpatterns = [
     path("profile/fresh_display_id", ProfileProblemDisplayIDRefreshAPI.as_view()),
     path("metrics", Metrics.as_view()),
     path("upload_avatar", AvatarUploadAPI.as_view()),
-    path("tfa_required", CheckTFARequiredAPI.as_view()),  # DEPRECATED: 前端未调用
-    path(
-        "two_factor_auth",  # DEPRECATED: 前端未调用
-        TwoFactorAuthAPI.as_view(),
-    ),
     path("user_rank", UserRankAPI.as_view()),
     path("user_activity_rank", UserActivityRankAPI.as_view()),
     path("user_problem_rank", UserProblemRankAPI.as_view()),
diff --git a/account/views/admin.py b/account/views/admin.py
index 95dd756..5a4be72 100644
--- a/account/views/admin.py
+++ b/account/views/admin.py
@@ -112,15 +112,6 @@ class UserAdminAPI(APIView):
             user.open_api_appkey = None
         user.open_api = data["open_api"]
 
-        if data["two_factor_auth"]:
-            # Avoid reset user tfa_token after saving changes
-            if not user.two_factor_auth:
-                user.tfa_token = rand_str()
-        else:
-            user.tfa_token = None
-
-        user.two_factor_auth = data["two_factor_auth"]
-
         user.save()
         if pre_username != user.username:
             Submission.objects.filter(username=pre_username).update(username=user.username)
diff --git a/account/views/oj.py b/account/views/oj.py
index 4f4616b..3848a98 100644
--- a/account/views/oj.py
+++ b/account/views/oj.py
@@ -3,7 +3,6 @@ import os
 from datetime import timedelta
 from importlib import import_module
 
-import qrcode
 from django.conf import settings
 from django.contrib import auth
 from django.db.models import Count, Q
@@ -12,7 +11,6 @@ from django.utils import timezone
 from django.utils.decorators import method_decorator
 from django.utils.timezone import now
 from django.views.decorators.csrf import csrf_exempt, ensure_csrf_cookie
-from otpauth import TOTP
 
 from options.options import SysOptions
 from problem.models import Problem
@@ -21,7 +19,7 @@ from utils.api import APIView, AsyncAPIView, CSRFExemptAPIView, validate_seriali
 from utils.async_helpers import async_cache_get, async_cache_set
 from utils.captcha import Captcha
 from utils.constants import CacheKey
-from utils.shortcuts import datetime2str, img2base64, rand_str
+from utils.shortcuts import datetime2str, rand_str
 
 from ..decorators import login_required
 from ..models import AdminType, User, UserProfile
@@ -32,7 +30,6 @@ from ..serializers import (
     RankInfoSerializer,
     ResetPasswordSerializer,
     SSOSerializer,
-    TwoFactorAuthCodeSerializer,
     UserChangeEmailSerializer,
     UserChangePasswordSerializer,
     UserLoginSerializer,
@@ -43,22 +40,6 @@ from ..serializers import (
 from ..tasks import send_email_async
 
 
-def _totp(token):
-    return TOTP(token.encode("utf-8"))
-
-
-def _totp_uri(token, label, issuer):
-    return _totp(token).to_uri(label, issuer)
-
-
-def _valid_totp(token, code):
-    try:
-        code = int(code)
-    except (TypeError, ValueError):
-        return False
-    return _totp(token).verify(code)
-
-
 class UserProfileAPI(AsyncAPIView):
     @method_decorator(ensure_csrf_cookie)
     async def get(self, request, **kwargs):
@@ -136,72 +117,6 @@ class AvatarUploadAPI(AsyncAPIView):
         return self.success("Succeeded")
 
 
-# DEPRECATED: 前端未调用 (2026-05-26)
-class TwoFactorAuthAPI(APIView):
-    @login_required
-    def get(self, request):
-        """
-        Get QR code
-        """
-        user = request.user
-        if user.two_factor_auth:
-            return self.error("2FA is already turned on")
-        token = rand_str()
-        user.tfa_token = token
-        user.save()
-
-        label = f"{SysOptions.website_name_shortcut}:{user.username}"
-        image = qrcode.make(_totp_uri(token, label, SysOptions.website_name.replace(" ", "")))
-        return self.success(img2base64(image))
-
-    @login_required
-    @validate_serializer(TwoFactorAuthCodeSerializer)
-    def post(self, request):
-        """
-        Open 2FA
-        """
-        code = request.data["code"]
-        user = request.user
-        if _valid_totp(user.tfa_token, code):
-            user.two_factor_auth = True
-            user.save()
-            return self.success("Succeeded")
-        else:
-            return self.error("Invalid code")
-
-    @login_required
-    @validate_serializer(TwoFactorAuthCodeSerializer)
-    def put(self, request):
-        code = request.data["code"]
-        user = request.user
-        if not user.two_factor_auth:
-            return self.error("2FA is already turned off")
-        if _valid_totp(user.tfa_token, code):
-            user.two_factor_auth = False
-            user.save()
-            return self.success("Succeeded")
-        else:
-            return self.error("Invalid code")
-
-
-# DEPRECATED: 前端未调用 (2026-05-26)
-class CheckTFARequiredAPI(APIView):
-    @validate_serializer(UsernameOrEmailCheckSerializer)
-    def post(self, request):
-        """
-        Check TFA is required
-        """
-        data = request.data
-        result = False
-        if data.get("username"):
-            try:
-                user = User.objects.get(username=data["username"])
-                result = user.two_factor_auth
-            except User.DoesNotExist:
-                pass
-        return self.success({"result": result})
-
-
 class UserLoginAPI(AsyncAPIView):
     @validate_serializer(UserLoginSerializer)
     async def post(self, request):
@@ -210,22 +125,10 @@ class UserLoginAPI(AsyncAPIView):
         if user:
             if user.is_disabled:
                 return self.error("Your account has been disabled")
-            if not user.two_factor_auth:
-                prev_login = user.last_login
-                await auth.alogin(request, user)
-                request.session["prev_login"] = datetime2str(prev_login) if prev_login else ""
-                return self.success("Succeeded")
-
-            if user.two_factor_auth and "tfa_code" not in data:
-                return self.error("tfa_required")
-
-            if _valid_totp(user.tfa_token, data["tfa_code"]):
-                prev_login = user.last_login
-                await auth.alogin(request, user)
-                request.session["prev_login"] = datetime2str(prev_login) if prev_login else ""
-                return self.success("Succeeded")
-            else:
-                return self.error("Invalid two factor verification code")
+            prev_login = user.last_login
+            await auth.alogin(request, user)
+            request.session["prev_login"] = datetime2str(prev_login) if prev_login else ""
+            return self.success("Succeeded")
         else:
             return self.error("Invalid username or password")
 
@@ -284,11 +187,6 @@ class UserChangeEmailAPI(APIView):
         data = request.data
         user = auth.authenticate(username=request.user.username, password=data["password"])
         if user:
-            if user.two_factor_auth:
-                if "tfa_code" not in data:
-                    return self.error("tfa_required")
-                if not _valid_totp(user.tfa_token, data["tfa_code"]):
-                    return self.error("Invalid two factor verification code")
             data["new_email"] = data["new_email"].lower()
             if User.objects.filter(email=data["new_email"]).exists():
                 return self.error("The email is owned by other account")
@@ -311,11 +209,6 @@ class UserChangePasswordAPI(APIView):
         username = request.user.username
         user = auth.authenticate(username=username, password=data["old_password"])
         if user:
-            if user.two_factor_auth:
-                if "tfa_code" not in data:
-                    return self.error("tfa_required")
-                if not _valid_totp(user.tfa_token, data["tfa_code"]):
-                    return self.error("Invalid two factor verification code")
             user.set_password(data["new_password"])
             user.save()
             return self.success("Succeeded")
@@ -373,7 +266,6 @@ class ResetPasswordAPI(APIView):
         if user.reset_password_token_expire_time < now():
             return self.error("Token has expired")
         user.reset_password_token = None
-        user.two_factor_auth = False
         user.set_password(data["password"])
         user.save()
         return self.success("Succeeded")
diff --git a/conf/urls/admin.py b/conf/urls/admin.py
index a9b5f6c..d0985ab 100644
--- a/conf/urls/admin.py
+++ b/conf/urls/admin.py
@@ -5,7 +5,6 @@ from ..views import (
     DashboardInfoAPI,
     JudgeServerAPI,
     RandomUsernameAPI,
-    ReleaseNotesAPI,
     SMTPTestAPI,
     TestCasePruneAPI,
     WebsiteConfigAPI,
@@ -18,6 +17,5 @@ urlpatterns = [
     path("random_user", RandomUsernameAPI.as_view()),
     path("judge_server", JudgeServerAPI.as_view()),
     path("prune_test_case", TestCasePruneAPI.as_view()),
-    path("versions", ReleaseNotesAPI.as_view()),  # DEPRECATED: 前端未调用
     path("dashboard_info", DashboardInfoAPI.as_view()),
 ]
diff --git a/conf/views.py b/conf/views.py
index 2429ca2..5732e99 100644
--- a/conf/views.py
+++ b/conf/views.py
@@ -1,19 +1,15 @@
 import asyncio
 import hashlib
-import json
 import os
 import random
 import re
 import shutil
 import smtplib
-import time
 from datetime import timedelta
 
-import requests
 from asgiref.sync import sync_to_async
 from django.conf import settings
 from django.utils import timezone
-from requests.exceptions import RequestException
 
 from account.decorators import super_admin_required
 from account.models import User
@@ -253,23 +249,6 @@ class TestCasePruneAPI(APIView):
             shutil.rmtree(test_case_dir, ignore_errors=True)
 
 
-# DEPRECATED: 前端未调用 (2026-05-26)
-class ReleaseNotesAPI(APIView):
-    def get(self, request):
-        try:
-            resp = requests.get(
-                "https://raw.githubusercontent.com/QingdaoU/OnlineJudge/master/docs/data.json?_=" + str(time.time()),
-                timeout=3,
-            )
-            releases = resp.json()
-        except (RequestException, ValueError):
-            return self.success()
-        with open("docs/data.json", "r") as f:
-            local_version = json.load(f)["update"][0]["version"]
-        releases["local_version"] = local_version
-        return self.success(releases)
-
-
 class DashboardInfoAPI(AsyncAPIView):
     async def get(self, request):
         now = timezone.now()
diff --git a/deploy/requirements.txt b/deploy/requirements.txt
index f5ef107..cf1aa1f 100644
--- a/deploy/requirements.txt
+++ b/deploy/requirements.txt
@@ -1,5 +1,5 @@
 # This file was autogenerated by uv via the following command:
-#    uv export --format requirements.txt --no-dev -o deploy/requirements.txt
+#    uv export --format requirements.txt
 annotated-types==0.7.0 \
     --hash=sha256:1f02e8b43a8fbbc3f3e0d4f0f4bfc8131bcb4eebe8849b8e5c773f3a1c582a53 \
     --hash=sha256:aff07c09a53a08bc8cfccb9c85b05f1aa9a2a6f23728d790723543408344ce89
@@ -25,7 +25,6 @@ certifi==2026.4.22 \
     # via
     #   httpcore
     #   httpx
-    #   requests
     #   sentry-sdk
 channels==4.3.2 \
     --hash=sha256:f2bb6bfb73ad7fb4705041d07613c7b4e69528f01ef8cb9fb6c21d9295f15667 \
@@ -37,62 +36,6 @@ channels-redis==4.3.0 \
     --hash=sha256:48f3e902ae2d5fef7080215524f3b4a1d3cea4e304150678f867a1a822c0d9f5 \
     --hash=sha256:740ee7b54f0e28cf2264a940a24453d3f00526a96931f911fcb69228ef245dd2
     # via onlinejudge
-charset-normalizer==3.4.9 \
-    --hash=sha256:0327fcd59a935777d83410750c50600ee9571af2846f71ce40f25b13da1ef380 \
-    --hash=sha256:03d07803992c6c7bbc976327f34b18b6160327fc81cb82c9d504720ac0be3b62 \
-    --hash=sha256:0d861473f743244d349b50f850d10eb87aeb22bbdcc8e64f79273c94af5a8226 \
-    --hash=sha256:16b65ea0f2465b6fb52aa22de5eca612aa964ddfec00a912e26f4656cbef890b \
-    --hash=sha256:19ac87f93086ce37b86e098888555c4b4bc48102279bae3350098c0ed664b501 \
-    --hash=sha256:21e764fd1e70b6a3e205a0e46f3051701f98a8cb3fad66eeb80e48bb502f8698 \
-    --hash=sha256:32286a2c8d167e897177b673176c1e3e00d4057caf5d2b64eef9a3666b03018e \
-    --hash=sha256:33bdcc2a32c0a0e861f60841a512c8acc658c87c2ac59d89e3a46dacf7d866e4 \
-    --hash=sha256:40a126142a56b2dfc0aacbad1de8310cbf60da7656db0e6b16eebd48e3e93519 \
-    --hash=sha256:416c229f77e5ea25b3dfd4b582f8d73d7e43c22320302b9ab128a2d3a0b38efe \
-    --hash=sha256:440eede837960000d74978f0eba527be106b5b9aee0daf779d395276ed0b0614 \
-    --hash=sha256:45b0cc4e3556cd875e09102988d1ab8356c998b596c9fced84547c8138b487a0 \
-    --hash=sha256:4b3dac63058cc36820b0dd072f89898604e2d39686fe05321729d00d8ac185a0 \
-    --hash=sha256:4d1c96a7a18b9690a4d46df09e3e3382406ae3213727cd1019ebade1c4a81917 \
-    --hash=sha256:51307f5c71007673a2bf8232ad973483d281e74cb99c8c5a990af1eefa6277d9 \
-    --hash=sha256:51447e9aa2684679af07ca5021c3db526e0284347ebf4ffcec1154c3350cfe32 \
-    --hash=sha256:5b10cd92fc5c498b35a8635df6d5a100207f88b63a4dc1de7ef9a548e1e2cd63 \
-    --hash=sha256:5e226f6218febc71f6c1fc2fafb91c226f75bdc1d8fb12d66823716e891608fd \
-    --hash=sha256:609b3ba8fcc0fb5ab7af00719d0fb6ad0cb518e48e7712d12fd68f1327951198 \
-    --hash=sha256:60f44ade2cf573dad7a277e6f8ca9a51a21dda572b13bd7d8539bb3cd5dbedde \
-    --hash=sha256:611057cc5d5c0afc743ba8be6bd828c17e0aaa8643f9d0a9b9bb7dea80eb8012 \
-    --hash=sha256:673611bbd43f0810bec0b0f028ddeaaa501190339cac411f347ac76917c3ae7b \
-    --hash=sha256:68e5f26a1ad57ded6d1cfb85331d1c1a195314756471d97758c48498bb4dcdf5 \
-    --hash=sha256:69b157c5d3292bcd443faca052f3096f637f1e074b98212a933c074ae23dc3b8 \
-    --hash=sha256:75286256590a6320cf106a0d28970d3560aad9ee09aa7b34fb40524792436d35 \
-    --hash=sha256:78841cccf1af7b40f6f716338d50c0902dbe88d9f800b3c973b7a9a0a693a642 \
-    --hash=sha256:78fa18e436a1a0e58dbd7e02fc4473f3f32cceb12df9dfca542d075961c307d2 \
-    --hash=sha256:7b86a2b16095d250c6f58b3d9b2eee6f4147754344f3dab0922f7c9bf7d226c9 \
-    --hash=sha256:83aed2c10721ddd90f68140685391b50811a880af20654c59af6b6c66c40513c \
-    --hash=sha256:84fd18bcc17526fc2b3c1af7d2b9217d32c9c04448c16ec693b9b4f1985c3d33 \
-    --hash=sha256:898f0e9068ca27d37f8e83a5b962821df851532e6c4a7d615c1c033f9da6eedf \
-    --hash=sha256:8a79d9f4d8001473a30c163556b3c3bfebec837495a412dde78b51672f6134f9 \
-    --hash=sha256:90c44bc373b7687f6948b693cceaea1348ae0975d7474746559494468e3c1d84 \
-    --hash=sha256:9104ed0bd76a429d46f9ec0dbc9b08ad1d2dcdf2b00a5a0daa1c145329b35b44 \
-    --hash=sha256:9b2aff1c7b3884512b9512c3eaadd9bab39fb45042ffaaa1dd08ff2b9f8109d9 \
-    --hash=sha256:9b8e0f3107e2200b76f6054de99016eac3ee6762713587b36baaa7e4bd2ae177 \
-    --hash=sha256:9cdef90ae47919cae358d8ab15797a800ed41da7aba5d72419fb510729e2ed4b \
-    --hash=sha256:a1786910334ed46ab1dd73222f2cd1e05c2c3bb39f6dddb4f8b36fc382058a39 \
-    --hash=sha256:a4cfde78a9f2880208d16a93b795726a3017d5977e08d1e162a7a31322479c41 \
-    --hash=sha256:a4fbdde9dd4a9ce5fd52c2b3a347bb50cc89483ef783f1cb00d408c13f7a96c0 \
-    --hash=sha256:bd47ba7fc3ca94896759ea0109775132d3e7ab921fbf54038e1bab2e46c313c9 \
-    --hash=sha256:c1c948747b03be832dceed96ca815cef7360de9aa19d37c730f8e3f6101aca48 \
-    --hash=sha256:c25fe15c70c59eb7c5ce8c06a1f3fa1da0ecc5ea1e7a5922c40fd2fa9b0d5046 \
-    --hash=sha256:cc1b0fff8ead343dae06305f954eb8468ba0ec1a97881f42489d198e4ce3c632 \
-    --hash=sha256:cd6c3d4b783c556fa00bf540854e42f135e2f256abd29669fcd0da0f2dec79c2 \
-    --hash=sha256:d4d6fcde76f94f5cb9e43e9e9a61f16dacefd228cbbf6f1a09bd9b219a92f1a1 \
-    --hash=sha256:df115d4d83168fdf2cae48ef1ff6d1cb4c466364e30861b37121de0f3bf1b990 \
-    --hash=sha256:e4fd89cc178bced6ad29cb3e6dd4aa63fa5017c3524dbd0b25998fb64a87cc8b \
-    --hash=sha256:ee2f2a527e3c1a6e6411eb4209642e138b544a2d72fe5d0d76daf77b24063534 \
-    --hash=sha256:f7fb7d750cfa0a070d2c24e831fd3481019a60dd317ea2b39acbcebc08b6ed81 \
-    --hash=sha256:f840ed6d8ecba8255df8c42b87fadeda98ddfc6eeec05e2dc66e26d46dd6f58a \
-    --hash=sha256:f86c6358749bd4fda175388691e3ba8c46e24c5347d0afd20f9b7edfc9faf07d \
-    --hash=sha256:fa36ec09ef71d158186bc79e359ff5fdd6e7996fe8ab638f00d6b93139ba4fcf \
-    --hash=sha256:fe2c7201c642b7c308f1675355ad7ff7b66acfe3541625efe5a3ad38f29d6115
-    # via requests
 click==8.4.1 \
     --hash=sha256:482be17c6991b8c19c5429a1e995d9b0efdbb63172824c41f99965dc0ade8ec2 \
     --hash=sha256:918b5633eddf6b41c32d4f454bf0de810065c74e3f7dbf8ee5452f8be88d3e96
@@ -102,7 +45,6 @@ colorama==0.4.6 ; sys_platform == 'win32' \
     --hash=sha256:4f1d9991f5acc0ca119f9d443620b77f9d6b33703e51011c16baf57afb285fc6
     # via
     #   click
-    #   qrcode
     #   tqdm
     #   uvicorn
 distro==1.9.0 \
@@ -119,9 +61,6 @@ django==6.0.4 \
     #   djangorestframework
     #   onlinejudge
     #   sentry-sdk
-django-dbconn-retry==0.3.1 \
-    --hash=sha256:d4b64d915440c3e5902ef8edf836366a6f4c4f027d34902135d7335233d6dbba
-    # via onlinejudge
 django-dramatiq==0.15.0 \
     --hash=sha256:23f0bc418a860952adbf822c4aa3b9c46c51d3d9f50be0a8ed3d19a53380df1d \
     --hash=sha256:e3cf1b2ac288fe4a7aa198c9450fe242ed312df8850f3f9e18ce01b8acc78b96
@@ -188,14 +127,15 @@ httptools==0.8.0 \
 httpx==0.28.1 \
     --hash=sha256:75e98c5f16b0f35b567856f597f06ff2270a374470a5c2392242528e3e3e42fc \
     --hash=sha256:d909fcccc110f8c7faf814ca82a9a4d816bc5a6dbfea25d6591d6985b8ba59ad
-    # via openai
+    # via
+    #   onlinejudge
+    #   openai
 idna==3.13 \
     --hash=sha256:585ea8fe5d69b9181ec1afba340451fba6ba764af97026f92a91d4eef164a242 \
     --hash=sha256:892ea0cde124a99ce773decba204c5552b69c3c67ffd5f232eb7696135bc8bb3
     # via
     #   anyio
     #   httpx
-    #   requests
 jieba==0.42.1 \
     --hash=sha256:055ca12f62674fafed09427f176506079bc135638a14e23e25be909131928db2
     # via onlinejudge
@@ -309,10 +249,6 @@ openai==2.34.0 \
     --hash=sha256:828b4efcbb126352c2b5eb97d33ae890c92a71ab72511aefc1b7fe64aeccb07b \
     --hash=sha256:c996a71b1a210f3569844572ad4c609307e978515fb76877cf449b72596e549e
     # via onlinejudge
-otpauth==2.2.1 \
-    --hash=sha256:169a7adbd715fca687f6a66d02ccdbefc229fb49f8a634b958d286f908134d59 \
-    --hash=sha256:b7eabe0ed91cb67eb3054b7f517e4b4a7495fb30eaf2951897d41c8feef5de73
-    # via onlinejudge
 packaging==26.2 \
     --hash=sha256:5fc45236b9446107ff2415ce77c807cee2862cb6fac22b8a73826d0693b0980e \
     --hash=sha256:ff452ff5a3e828ce110190feff1178bb1f2ea2281fa2075aadb987c2fb221661
@@ -540,20 +476,31 @@ pyyaml==6.0.3 \
     --hash=sha256:f7057c9a337546edc7973c0d3ba84ddcdf0daa14533c2065749c9075001090e6 \
     --hash=sha256:fc09d0aa354569bc501d4e787133afc08552722d3ab34836a80547331bb5d4a0
     # via uvicorn
-qrcode==8.2 \
-    --hash=sha256:16e64e0716c14960108e85d853062c9e8bba5ca8252c0b4d0231b9df4060ff4f \
-    --hash=sha256:35c3f2a4172b33136ab9f6b3ef1c00260dd2f66f858f24d88418a015f446506c
-    # via onlinejudge
 redis==7.4.0 \
     --hash=sha256:64a6ea7bf567ad43c964d2c30d82853f8df927c5c9017766c55a1d1ed95d18ad \
     --hash=sha256:a9c74a5c893a5ef8455a5adb793a31bb70feb821c86eccb62eebef5a19c429ec
     # via
     #   channels-redis
     #   django-redis
-requests==2.34.2 \
-    --hash=sha256:2a0d60c172f83ac6ab31e4554906c0f3b3588d37b5cb939b1c061f4907e278e0 \
-    --hash=sha256:f288924cae4e29463698d6d60bc6a4da69c89185ad1e0bcc4104f584e960b9ed
-    # via onlinejudge
+ruff==0.15.12 \
+    --hash=sha256:01da3988d225628b709493d7dc67c3b9b12c0210016b08690ef9bd27970b262b \
+    --hash=sha256:2849ea9f3484c3aca43a82f484210370319e7170df4dfe4843395ddf6c57bc33 \
+    --hash=sha256:83b2f4f2f3b1026b5fb449b467d9264bf22067b600f7b6f41fc5958909f449d0 \
+    --hash=sha256:84a1630093121375a3e2a95b4a6dc7b59e2b4ee76216e32d81aae550a832d002 \
+    --hash=sha256:9ba3b8f1afd7e2e43d8943e55f249e13f9682fde09711644a6e7290eb4f3e339 \
+    --hash=sha256:9cae0f92bd5700d1213188b31cd3bdd2b315361296d10b96b8e2337d3d11f53e \
+    --hash=sha256:9e77c7e51c07fe396826d5969a5b846d9cd4c402535835fb6e21ce8b28fef847 \
+    --hash=sha256:a538f7a82d061cee7be55542aca1d86d1393d55d81d4fcc314370f4340930d4f \
+    --hash=sha256:b0c862b172d695db7598426b8af465e7e9ac00a3ea2a3630ee67eb82e366aaa6 \
+    --hash=sha256:c87a162d61ab3adca47c03f7f717c68672edec7d1b5499e652331780fe74950d \
+    --hash=sha256:d0185894e038d7043ba8fd6aee7499ece6462dc0ea9f1e260c7451807c714c20 \
+    --hash=sha256:dd8aed930da53780d22fc70bdf84452c843cf64f8cb4eb38984319c24c5cd5fd \
+    --hash=sha256:e3bcd123364c3770b8e1b7baaf343cc99a35f197c5c6e8af79015c666c423a6c \
+    --hash=sha256:e852ba9fdc890655e1d78f2df1499efbe0e54126bd405362154a75e2bde159c5 \
+    --hash=sha256:ecea26adb26b4232c0c2ca19ccbc0083a68344180bba2a600605538ce51a40a6 \
+    --hash=sha256:f86f176e188e94d6bdbc09f09bfd9dc729059ad93d0e7390b5a73efe19f8861c \
+    --hash=sha256:fb129f40f114f089ebe0ca56c0d251cf2061b17651d464bb6478dc01e69f11f5 \
+    --hash=sha256:fe87510d000220aa1ed530d4448a7c696a0cae1213e5ec30e5874287b66557b5
 sentry-sdk==2.59.0 \
     --hash=sha256:abcf65ee9a9d9cdebf9ad369782408ecca9c1c792686ef06ba34f5ab233527fe \
     --hash=sha256:cd265808ef8bf3f3edf69b527c0a0b2b6b1322762679e55b8987db2e9584aec1
@@ -643,9 +590,7 @@ tzdata==2026.2 ; sys_platform == 'win32' \
 urllib3==2.6.3 \
     --hash=sha256:1b62b6884944a57dbe321509ab94fd4d3b307075e0c2eae991ac71ee15ad38ed \
     --hash=sha256:bf272323e553dfb2e87d9bfd225ca7b0f467b919d7bbd355436d3fd37cb0acd4
-    # via
-    #   requests
-    #   sentry-sdk
+    # via sentry-sdk
 uvicorn==0.48.0 \
     --hash=sha256:48097851328b87ec36117d3d575234519eb58c2b22d79666e9bbc6c49a761dad \
     --hash=sha256:a5504207195d08c2511bf9125ede5ac4a4b71725d519e758d01dcf0bc2d31c37
diff --git a/judge/dispatcher.py b/judge/dispatcher.py
index c21c4aa..d8c2448 100644
--- a/judge/dispatcher.py
+++ b/judge/dispatcher.py
@@ -4,7 +4,7 @@ import logging
 from datetime import timedelta
 from urllib.parse import urljoin
 
-import requests
+import httpx
 from django.db import IntegrityError, transaction
 from django.db.models import F
 from django.utils import timezone
@@ -73,7 +73,8 @@ class DispatcherBase(object):
         if data:
             kwargs["json"] = data
         try:
-            return requests.post(url, **kwargs).json()
+            # timeout=None 保持与原 requests 实现一致：判题请求是同步等结果的，不能被默认超时打断
+            return httpx.post(url, timeout=None, **kwargs).json()
         except Exception as e:
             logger.exception(e)
 
diff --git a/oj/settings.py b/oj/settings.py
index 3185e75..a4ec429 100644
--- a/oj/settings.py
+++ b/oj/settings.py
@@ -40,7 +40,6 @@ VENDOR_APPS = [
     "rest_framework",
     "channels",
     "django_dramatiq",
-    "django_dbconn_retry",
 ]
 
 
diff --git a/pyproject.toml b/pyproject.toml
index 6955919..e210c7d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,20 +9,17 @@ dependencies = [
     "channels-redis>=4.3.0,<5",
     "uvicorn[standard]>=0.34.0,<1",
     "django>=6.0.4,<6.1",
-    "django-dbconn-retry>=0.3.1,<0.4",
     "django-dramatiq>=0.15.0,<0.16",
     "django-redis>=6.0.0,<7",
     "djangorestframework>=3.17.1,<4",
     "dramatiq>=2.1.0,<3",
     "gunicorn>=26.0.0,<27",
+    "httpx>=0.28.1,<1",
     "openai>=2.34.0,<3",
-    "otpauth>=2.2.1,<3",
     "pillow>=12.2.0,<13",
     "psycopg>=3.3.4,<4",
     "psycopg-binary>=3.3.4,<4",
     "python-dateutil>=2.9.0.post0,<3",
-    "qrcode>=8.2,<9",
-    "requests>=2.33.1,<3",
     "sentry-sdk[django]>=2.0.0,<3",
     "tree-sitter>=0.25.2",
     "tree-sitter-c>=0.24.2",
diff --git a/uv.lock b/uv.lock
index 22804c9..3c36c52 100644
--- a/uv.lock
+++ b/uv.lock
@@ -70,67 +70,6 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/df/fe/b7224a401ad227b263e5ba84753ffb5a88df048f3b15efd2797903543ce4/channels_redis-4.3.0-py3-none-any.whl", hash = "sha256:48f3e902ae2d5fef7080215524f3b4a1d3cea4e304150678f867a1a822c0d9f5", size = 20641, upload-time = "2025-07-22T13:48:44.545Z" },
 ]
 
-[[package]]
-name = "charset-normalizer"
-version = "3.4.9"
-source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/bd/2a/23f34ec9d04624958e137efdc394888716353190e75f25dd22c7a2c7a8aa/charset_normalizer-3.4.9.tar.gz", hash = "sha256:673611bbd43f0810bec0b0f028ddeaaa501190339cac411f347ac76917c3ae7b", size = 152439, upload-time = "2026-07-07T14:34:58.454Z" }
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     { url = "https://files.pythonhosted.org/packages/74/3a/95deec7db1eb53979973ebd156f3369a72732208d1391cd2e5d127062a32/redis-7.4.0-py3-none-any.whl", hash = "sha256:a9c74a5c893a5ef8455a5adb793a31bb70feb821c86eccb62eebef5a19c429ec", size = 409772, upload-time = "2026-03-24T09:14:35.968Z" },
 ]
 
-[[package]]
-name = "requests"
-version = "2.34.2"
-source = { registry = "https://pypi.org/simple" }
-dependencies = [
-    { name = "certifi" },
-    { name = "charset-normalizer" },
-    { name = "idna" },
-    { name = "urllib3" },
-]
-sdist = { url = "https://files.pythonhosted.org/packages/ac/c3/e2a2b89f2d3e2179abd6d00ebd70bff6273f37fb3e0cc209f48b39d00cbf/requests-2.34.2.tar.gz", hash = "sha256:f288924cae4e29463698d6d60bc6a4da69c89185ad1e0bcc4104f584e960b9ed", size = 142856, upload-time = "2026-05-14T19:25:27.735Z" }
-wheels = [
-    { url = "https://files.pythonhosted.org/packages/a0/f4/c67b0b3f1b9245e8d266f0f112c500d50e5b4e83cb6f3b71b6528104182a/requests-2.34.2-py3-none-any.whl", hash = "sha256:2a0d60c172f83ac6ab31e4554906c0f3b3588d37b5cb939b1c061f4907e278e0", size = 73075, upload-time = "2026-05-14T19:25:26.443Z" },
-]
-
 [[package]]
 name = "ruff"
 version = "0.15.12"