diff --git a/misskaty/plugins/genss.py b/misskaty/plugins/genss.py
index 94c06372..61584cae 100644
--- a/misskaty/plugins/genss.py
+++ b/misskaty/plugins/genss.py
@@ -41,11 +41,12 @@ async def genss(client, message):
         if media is None:
             return await message.reply("Reply to a Telegram Video or document as video to generate screenshoot!")
         process = await message.reply_text("`Processing, please wait..`")
-        if not DL_TASK.get(message.from_user.id):
-            DL_TASK[message.from_user.id] = Lock()
+        async with Lock():
+            if not DL_TASK.get(message.from_user.id):
+                DL_TASK[message.from_user.id] = Lock()
 
-        if DL_TASK[message.from_user.id].locked():
-            return await process.edit("Sorry to avoid flood and error, bot only process one task at a time.")
+            if DL_TASK[message.from_user.id].locked():
+                return await process.edit("Sorry to avoid flood and error, bot only process one task at a time.")
         c_time = time.time()
         the_real_download_location = await replied.download(
             progress=progress_for_pyrogram,