diff --git a/src/plugins/hk_reporter/utils.py b/src/plugins/hk_reporter/utils.py
index edccc64..21e6180 100644
--- a/src/plugins/hk_reporter/utils.py
+++ b/src/plugins/hk_reporter/utils.py
@@ -1,4 +1,5 @@
 import os
+import asyncio
 import nonebot
 from nonebot import logger
 import base64
@@ -20,27 +21,26 @@ supported_target_type = ('weibo', 'bilibili', 'rss')
 class Render(metaclass=Singleton):
 
     def __init__(self):
-        self.browser = None
-
-    async def init(self):
-        if plugin_config.hk_reporter_use_local:
-            self.browser = await launch(executablePath='/usr/bin/chromium', args=['--no-sandbox'])
-        else:
-            self.browser = await launch(args=['--no-sandbox'])
-        # self.page = await browser.newPage()
+        self.lock = asyncio.Lock()
 
     async def text_to_pic(self, text: str) -> str:
-        page = await self.browser.newPage()
-        hash_text = sha256(text.encode()).hexdigest()[:20]
-        lines = text.split('\n')
-        parsed_lines = list(map(lambda x: '<p>{}</p>'.format(escape(x)), lines))
-        html_text = '<div style="width:17em;padding:1em">{}</div>'.format(''.join(parsed_lines))
-        with open('/tmp/text-{}.html'.format(hash_text), 'w') as f:
-            f.write(html_text)
-        await page.goto('file:///tmp/text-{}.html'.format(hash_text))
-        div = await page.querySelector('div')
-        data = await div.screenshot(type='jpeg', encoding='base64')
-        await page.close()
+        async with self.lock:
+            if plugin_config.hk_reporter_use_local:
+                browser = await launch(executablePath='/usr/bin/chromium', args=['--no-sandbox'])
+            else:
+                browser = await launch(args=['--no-sandbox'])
+            page = await browser.newPage()
+            hash_text = sha256(text.encode()).hexdigest()[:20]
+            lines = text.split('\n')
+            parsed_lines = list(map(lambda x: '<p>{}</p>'.format(escape(x)), lines))
+            html_text = '<div style="width:17em;padding:1em">{}</div>'.format(''.join(parsed_lines))
+            with open('/tmp/text-{}.html'.format(hash_text), 'w') as f:
+                f.write(html_text)
+            await page.goto('file:///tmp/text-{}.html'.format(hash_text))
+            div = await page.querySelector('div')
+            data = await div.screenshot(type='jpeg', encoding='base64')
+            await page.close()
+            await browser.close()
         os.remove('/tmp/text-{}.html'.format(hash_text))
         return data