diff --git a/setup.py b/setup.py
index a26d295..b850715 100644
--- a/setup.py
+++ b/setup.py
@@ -8,7 +8,7 @@ def readme():
 
 setuptools.setup(
     name='streamlit-chatbox',
-    version='0.2.3',
+    version='0.2.4',
     author='liunux',
     author_email='liunux@qq.com',
     description='A chat box used in streamlit',
diff --git a/streamlit_chatbox/__init__.py b/streamlit_chatbox/__init__.py
index 6f65cb0..8ea5865 100644
--- a/streamlit_chatbox/__init__.py
+++ b/streamlit_chatbox/__init__.py
@@ -177,11 +177,13 @@ def output_messages(
                     self.last_response = empty
         return self.last_response
 
-    def update_last_box_text(self, msg):
+    def update_last_box_text(self, msg, cursor_pos="\n\n<details>"):
         if self.last_response is not None:
             self.history[-1]['content'] = msg
+            if cursor_pos:
+                msg = msg.replace(cursor_pos, " ▌" + cursor_pos, 1)
             self.last_response.markdown(
-                self.format_md(msg + '▌', False),
+                self.format_md(msg, False),
                 unsafe_allow_html=True
             )