diff --git a/DrissionPage/chromium_base.py b/DrissionPage/chromium_base.py
index 2768743..9badf6b 100644
--- a/DrissionPage/chromium_base.py
+++ b/DrissionPage/chromium_base.py
@@ -270,10 +270,10 @@ class ChromiumBase(BasePage):
 
     @property
     def ready_state(self):
-        """返回当前页面加载状态，'loading' 'interactive' 'complete'"""
+        """返回当前页面加载状态，'loading' 'interactive' 'complete'，有弹出框时返回None"""
         try:
             return self.run_cdp('Runtime.evaluate', expression='document.readyState;')['result']['value']
-        except AlertExistsError:
+        except (AlertExistsError, TypeError):
             return None
 
     @property
diff --git a/DrissionPage/chromium_base.pyi b/DrissionPage/chromium_base.pyi
index d03da87..96b5de3 100644
--- a/DrissionPage/chromium_base.pyi
+++ b/DrissionPage/chromium_base.pyi
@@ -96,7 +96,7 @@ class ChromiumBase(BasePage):
     def tab_id(self) -> str: ...
 
     @property
-    def ready_state(self) -> str: ...
+    def ready_state(self) -> Union[str, None]: ...
 
     @property
     def size(self) -> Tuple[int, int]: ...