diff --git a/go.mod b/go.mod
index d0022af3d..505d5e4a9 100644
--- a/go.mod
+++ b/go.mod
@@ -3,6 +3,6 @@ module github.com/yomorun/yomo
 go 1.14
 
 require (
-	github.com/10cella/yomo-json-codec v0.2.5
+	github.com/10cella/yomo-json-codec v0.2.6
 	github.com/lucas-clemente/quic-go v0.17.1
 )
diff --git a/go.sum b/go.sum
index 39716f3e8..206a37282 100644
--- a/go.sum
+++ b/go.sum
@@ -23,6 +23,8 @@ github.com/10cella/yomo-json-codec v0.2.4 h1:bdOInT1MnBhXDsGBHx/fYn0CiXzKxrm5/kF
 github.com/10cella/yomo-json-codec v0.2.4/go.mod h1:j4rl6bth7Bb6F8UC0SPN2XxlGGUsHGWO8LnrH5Q8RzI=
 github.com/10cella/yomo-json-codec v0.2.5 h1:XTWWFVkQENaLLBTxBdXyG61UneA8SQF/YdlnyHptV/o=
 github.com/10cella/yomo-json-codec v0.2.5/go.mod h1:j4rl6bth7Bb6F8UC0SPN2XxlGGUsHGWO8LnrH5Q8RzI=
+github.com/10cella/yomo-json-codec v0.2.6 h1:LjJHlYtQ9nma84/Tbo56lessv5ojHKP3nGTuj6v4Z08=
+github.com/10cella/yomo-json-codec v0.2.6/go.mod h1:j4rl6bth7Bb6F8UC0SPN2XxlGGUsHGWO8LnrH5Q8RzI=
 github.com/10cella/yomo-txtkv-codec v1.0.5 h1:rVdtBcsff3RG3BEq7AHq2WvNiGDF6IEKlTiplypfX+c=
 github.com/10cella/yomo-txtkv-codec v1.0.5/go.mod h1:nBfcD3qVq6kkSRHOgSUxK1+gMRoXI0obLF+b1eiyCtM=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
diff --git a/pkg/util/quic.go b/pkg/util/quic.go
index da5e53710..22f036429 100644
--- a/pkg/util/quic.go
+++ b/pkg/util/quic.go
@@ -79,6 +79,9 @@ func (w YomoFrameworkStreamWriter) Write(b []byte) (c int, e error) {
 		}
 
 		logger.Debugf("Plugin.Handle result: %s", result) //debug:
+		if result == nil {
+			continue
+		}
 
 		num, err = w.Codec.Write(w.Writer, result, w.Plugin.Mold())
 		if err != nil {