diff --git a/DrissionPage/__init__.py b/DrissionPage/__init__.py
index 59ac683..09f8ea7 100644
--- a/DrissionPage/__init__.py
+++ b/DrissionPage/__init__.py
@@ -14,4 +14,4 @@ from ._pages.chromium_page import ChromiumPage
 from ._pages.mix_page import MixPage
 from ._pages.mix_page import MixPage as WebPage
 
-__version__ = '4.1.0.0b17'
+__version__ = '4.1.0.0b18'
diff --git a/DrissionPage/_base/driver.py b/DrissionPage/_base/driver.py
index 8a75f01..807b648 100644
--- a/DrissionPage/_base/driver.py
+++ b/DrissionPage/_base/driver.py
@@ -10,6 +10,7 @@ from queue import Queue, Empty
 from threading import Thread
 from time import perf_counter, sleep
 
+from requests import adapters
 from requests import Session
 from websocket import (WebSocketTimeoutException, WebSocketConnectionClosedException, create_connection,
                        WebSocketException, WebSocketBadStatusException)
@@ -17,6 +18,8 @@ from websocket import (WebSocketTimeoutException, WebSocketConnectionClosedExcep
 from .._functions.settings import Settings
 from ..errors import PageDisconnectedError, BrowserConnectError
 
+adapters.DEFAULT_RETRIES = 5
+
 
 class Driver(object):
     def __init__(self, tab_id, tab_type, address, owner=None):
@@ -283,14 +286,15 @@ class BrowserDriver(Driver):
         self._created = True
         BrowserDriver.BROWSERS[tab_id] = self
         super().__init__(tab_id, tab_type, address, owner)
-        self._control_session = Session()
-        self._control_session.trust_env = False
-        self._control_session.keep_alive = False
 
     def __repr__(self):
         return f'<BrowserDriver {self.id}>'
 
     def get(self, url):
-        r = self._control_session.get(url, headers={'Connection': 'close'})
+        s = Session()
+        s.trust_env = False
+        s.keep_alive = False
+        r = s.get(url, headers={'Connection': 'close'})
         r.close()
+        s.close()
         return r
diff --git a/DrissionPage/_base/driver.pyi b/DrissionPage/_base/driver.pyi
index be5f7c1..539676d 100644
--- a/DrissionPage/_base/driver.pyi
+++ b/DrissionPage/_base/driver.pyi
@@ -9,7 +9,7 @@ from queue import Queue
 from threading import Thread
 from typing import Union, Callable, Dict, Optional
 
-from requests import Response, Session
+from requests import Response
 from websocket import WebSocket
 
 from .browser import Chromium
@@ -69,7 +69,6 @@ class Driver(object):
 class BrowserDriver(Driver):
     BROWSERS: Dict[str, Driver] = ...
     owner: Chromium = ...
-    _control_session: Session = ...
 
     def __new__(cls, tab_id: str, tab_type: str, address: str, owner: Chromium): ...
 
diff --git a/DrissionPage/_elements/chromium_element.py b/DrissionPage/_elements/chromium_element.py
index 810d1df..e0e40ea 100644
--- a/DrissionPage/_elements/chromium_element.py
+++ b/DrissionPage/_elements/chromium_element.py
@@ -164,11 +164,12 @@ class ChromiumElement(DrissionElement):
     @property
     def sr(self):
         """返回当前元素的shadow_root元素对象"""
-        info = self.owner._run_cdp('DOM.describeNode', backendNodeId=self._backend_id)['node']
-        if not info.get('shadowRoots', None):
-            return None
-
-        return ShadowRoot(self, backend_id=info['shadowRoots'][0]['backendNodeId'])
+        end_time = perf_counter() + self.owner.timeout
+        while perf_counter() < end_time:
+            info = self.owner._run_cdp('DOM.describeNode', backendNodeId=self._backend_id)['node']
+            if info.get('shadowRoots', None):
+                return ShadowRoot(self, backend_id=info['shadowRoots'][0]['backendNodeId'])
+        return None
 
     @property
     def shadow_root(self):