diff --git a/pytchat/core_async/buffer.py b/pytchat/core_async/buffer.py
index 5abdc7a..e93357e 100644
--- a/pytchat/core_async/buffer.py
+++ b/pytchat/core_async/buffer.py
@@ -20,6 +20,13 @@ class Buffer(asyncio.Queue):
             super().get_nowait()
         await super().put(item)
 
+    def put_nowait(self,item):
+        if item is None:
+            return 
+        if super().full():
+            super().get_nowait()
+        super().put_nowait(item)
+
     async def get(self):
         ret = []
         ret.append(await super().get())
diff --git a/pytchat/core_multithread/buffer.py b/pytchat/core_multithread/buffer.py
index c1ef2fe..3898572 100644
--- a/pytchat/core_multithread/buffer.py
+++ b/pytchat/core_multithread/buffer.py
@@ -22,7 +22,14 @@ class Buffer(queue.Queue):
         else:
             super().put(item)
             
-
+    def put_nowait(self,item):
+        if item is None:
+            return 
+        if super().full():
+            super().get_nowait()
+        else:
+            super().put_nowait(item)
+            
     def get(self):
         ret = []
         ret.append(super().get())