diff --git a/DrissionPage/session_page.py b/DrissionPage/session_page.py
index b6c1193..738d9a4 100644
--- a/DrissionPage/session_page.py
+++ b/DrissionPage/session_page.py
@@ -7,7 +7,7 @@ from re import search
 from time import sleep
 from urllib.parse import urlparse
 
-from requests import Session, Response
+from requests import Session
 from requests.structures import CaseInsensitiveDict
 from tldextract import extract
 
@@ -305,15 +305,17 @@ class SessionPage(BasePage):
             return r, f'状态码：{r.status_code}'
 
 
-def check_headers(kwargs, headers, arg) -> bool:
+def check_headers(kwargs, headers, arg):
     """检查kwargs或headers中是否有arg所示属性"""
     return arg in kwargs['headers'] or arg in headers
 
 
-def set_charset(response) -> Response:
+def set_charset(response):
     """设置Response对象的编码"""
     # 在headers中获取编码
     content_type = response.headers.get('content-type', '').lower()
+    if not content_type.endswith(';'):
+        content_type += ';'
     charset = search(r'charset[=: ]*(.*)?;', content_type)
 
     if charset: