diff --git a/core/core.go b/core/core.go
index 9c5ee603033..d3be559db81 100644
--- a/core/core.go
+++ b/core/core.go
@@ -418,7 +418,7 @@ func makeSmuxTransportOption(mplexExp bool) libp2p.Option {
 		ConnectionWriteTimeout: time.Second * 10,
 		KeepAliveInterval:      time.Second * 30,
 		EnableKeepAlive:        true,
-		MaxStreamWindowSize:    uint32(1024 * 512),
+		MaxStreamWindowSize:    uint32(16 * 1024 * 1024), // 16MiB
 		LogOutput:              ioutil.Discard,
 	}