diff --git a/app/account_service.py b/app/account_service.py
index 1717889..e572bd0 100644
--- a/app/account_service.py
+++ b/app/account_service.py
@@ -5,11 +5,6 @@ from Login import check_username_availability, verify_user, add_user, get_expiry
 # 初始化蓝图
 accountService = Blueprint("accountService", __name__)
 
-# 确认密码和输入密码是否一致
-def verify_passverified(password,password2):
-    if(password==password2):
-        return True
-
 ### Sign-up, login, logout ###
 @accountService.route("/signup", methods=['GET', 'POST'])
 def signup():
@@ -33,13 +28,12 @@ def signup():
         
         available = check_username_availability(username)
         
-        verified_2 = verify_passverified(password, password2)  # 比较“密码”与“确认密码” 
         if not available: # 用户名不可用
             flash('用户名 %s 已经被注册。' % (username))
             return render_template('signup.html')
         elif len(password.strip()) < 4: # 密码过短
             return '密码过于简单。'
-        elif not verified_2:
+        elif password != password2:
             return '确认密码与输入密码不一致！'
         else: # 添加账户信息
             add_user(username, password)
diff --git a/requirements.txt b/requirements.txt
index 8552794..2746a3b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
-Flask==2.1.0
+Flask==1.1.2
 selenium==3.141.0
 PyYAML~=6.0