diff --git a/forwardproxy.go b/forwardproxy.go
index 32235af..5fb26fb 100644
--- a/forwardproxy.go
+++ b/forwardproxy.go
@@ -579,6 +579,7 @@ func dualStream(target net.Conn, clientReader io.ReadCloser, clientWriter io.Wri
 		buf := bufferPool.Get().([]byte)
 		buf = buf[0:cap(buf)]
 		_, _err := flushingIoCopy(w, r, buf)
+		bufferPool.Put(buf)
 		if cw, ok := w.(closeWriter); ok {
 			cw.CloseWrite()
 		}
@@ -642,6 +643,7 @@ func forwardResponse(w http.ResponseWriter, response *http.Response) error {
 	buf := bufferPool.Get().([]byte)
 	buf = buf[0:cap(buf)]
 	_, err := io.CopyBuffer(w, response.Body, buf)
+	bufferPool.Put(buf)
 	return err
 }