diff --git a/DrissionPage/__init__.py b/DrissionPage/__init__.py
index 9bb8baf..e173e0d 100644
--- a/DrissionPage/__init__.py
+++ b/DrissionPage/__init__.py
@@ -14,4 +14,4 @@ from ._configs.chromium_options import ChromiumOptions
 from ._configs.session_options import SessionOptions
 
 __all__ = ['ChromiumPage', 'ChromiumOptions', 'SessionOptions', 'SessionPage', 'WebPage', '__version__']
-__version__ = '4.0.5.3'
+__version__ = '4.0.5.4'
diff --git a/DrissionPage/_pages/session_page.py b/DrissionPage/_pages/session_page.py
index 4f699c8..94a7d07 100644
--- a/DrissionPage/_pages/session_page.py
+++ b/DrissionPage/_pages/session_page.py
@@ -292,23 +292,25 @@ class SessionPage(BasePage):
         """
         kwargs = CaseInsensitiveDict(kwargs)
         if 'headers' not in kwargs:
-            kwargs['headers'] = {}
+            kwargs['headers'] = CaseInsensitiveDict()
         else:
             kwargs['headers'] = CaseInsensitiveDict(format_headers(kwargs['headers']))
 
         # 设置referer和host值
         parsed_url = urlparse(url)
-        hostname = parsed_url.hostname
+        hostname = parsed_url.netloc
         scheme = parsed_url.scheme
         if not check_headers(kwargs['headers'], self._headers, 'Referer'):
             kwargs['headers']['Referer'] = self.url if self.url else f'{scheme}://{hostname}'
-        if 'Host' not in kwargs['headers']:
+        if not check_headers(kwargs['headers'], self._headers, 'Host'):
             kwargs['headers']['Host'] = hostname
-
         if not check_headers(kwargs, self._headers, 'timeout'):
             kwargs['timeout'] = self.timeout
 
-        kwargs['headers'] = {**self._headers, **kwargs['headers']}
+        h = CaseInsensitiveDict(self._headers)
+        for k, v in kwargs['headers'].items():
+            h[k] = v
+        kwargs['headers'] = h
 
         r = err = None
         retry = retry if retry is not None else self.retry_times