diff --git a/Sources/HPRTMP/RTMPPublishSession.swift b/Sources/HPRTMP/RTMPPublishSession.swift
index d8fde9c..c050deb 100644
--- a/Sources/HPRTMP/RTMPPublishSession.swift
+++ b/Sources/HPRTMP/RTMPPublishSession.swift
@@ -144,7 +144,7 @@ extension RTMPPublishSession: RTMPSocketDelegate {
       await socket.send(message: message, firstType: true)
       
       // make chunk size more bigger
-      let chunkSize: UInt32 = 128 * 6
+      let chunkSize: UInt32 = 128 * 60
       let size = ChunkSizeMessage(size: chunkSize)
       await socket.send(message: size, firstType: true)
     }