diff --git a/Gopkg.lock b/Gopkg.lock
index 2672664..5e22e9a 100644
--- a/Gopkg.lock
+++ b/Gopkg.lock
@@ -17,7 +17,7 @@
   branch = "master"
   name = "git.loafle.net/commons/rpc-go"
   packages = ["protocol"]
-  revision = "dcc3af07239b3f6fcbae3529bcb52c522b02053d"
+  revision = "f5810183daf8aad248da6aab13fc5785ab984be4"
 
 [[projects]]
   branch = "master"
@@ -27,7 +27,7 @@
     "socket",
     "socket/web"
   ]
-  revision = "1cae23cf7819d56fd399346a1dc30af6a82d1a93"
+  revision = "d1d485c711ef8c59ad51fbf17dba80158f1a8ace"
 
 [[projects]]
   branch = "master"
@@ -45,7 +45,7 @@
   branch = "master"
   name = "git.loafle.net/overflow/commons-go"
   packages = ["config/external"]
-  revision = "687985e7f2122d12e43a0111f13d6df9921c3d82"
+  revision = "7e2ff26648aefbafaee2ca28c1a958332ae4c6f9"
 
 [[projects]]
   branch = "master"
@@ -99,8 +99,8 @@
     "models",
     "pkg/escape"
   ]
-  revision = "89e084a80fb1e0bf5e7d38038e3367f821fdf3d7"
-  version = "v1.5.3"
+  revision = "4e4e00bc5ab85a3ff5e988c91020cf0399a87026"
+  version = "v1.5.4"
 
 [[projects]]
   name = "github.com/klauspost/compress"
@@ -109,8 +109,8 @@
     "gzip",
     "zlib"
   ]
-  revision = "6c8db69c4b49dd4df1fff66996cf556176d0b9bf"
-  version = "v1.2.1"
+  revision = "5fb1f31b0a61e9858f12f39266e059848a5f1cea"
+  version = "v1.3.0"
 
 [[projects]]
   name = "github.com/klauspost/cpuid"
@@ -118,12 +118,6 @@
   revision = "ae7887de9fa5d2db4eaa8174a7eff2c1ac00f2da"
   version = "v1.1"
 
-[[projects]]
-  name = "github.com/klauspost/crc32"
-  packages = ["."]
-  revision = "cb6bfca970f6908083f26f39a79009d608efd5cd"
-  version = "v1.1"
-
 [[projects]]
   branch = "master"
   name = "github.com/segmentio/kafka-go"
@@ -176,7 +170,7 @@
     "internal/timeseries",
     "trace"
   ]
-  revision = "db08ff08e8622530d9ed3a0e8ac279f6d4c02196"
+  revision = "4cb1c02c05b0e749b0365f61ae859a8e0cfceed9"
 
 [[projects]]
   name = "golang.org/x/text"
@@ -203,7 +197,7 @@
   branch = "master"
   name = "google.golang.org/genproto"
   packages = ["googleapis/rpc/status"]
-  revision = "32ee49c4dd805befd833990acba36cb75042378c"
+  revision = "ff3583edef7de132f219f0efc00e097cabcc0ec0"
 
 [[projects]]
   name = "google.golang.org/grpc"
@@ -212,15 +206,16 @@
     "balancer",
     "balancer/base",
     "balancer/roundrobin",
-    "channelz",
     "codes",
     "connectivity",
     "credentials",
     "encoding",
     "encoding/proto",
-    "grpclb/grpc_lb_v1/messages",
     "grpclog",
     "internal",
+    "internal/backoff",
+    "internal/channelz",
+    "internal/grpcrand",
     "keepalive",
     "metadata",
     "naming",
@@ -233,8 +228,8 @@
     "tap",
     "transport"
   ]
-  revision = "7a6a684ca69eb4cae85ad0a484f2e531598c047b"
-  version = "v1.12.2"
+  revision = "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
+  version = "v1.13.0"
 
 [[projects]]
   name = "gopkg.in/yaml.v2"
diff --git a/servlet/rpc-servlet.go b/servlet/rpc-servlet.go
index fdc2660..417bb5d 100644
--- a/servlet/rpc-servlet.go
+++ b/servlet/rpc-servlet.go
@@ -58,20 +58,22 @@ func (s *RPCServlets) OnDisconnect(servletCtx server.ServletCtx) {
 
 func (s *RPCServlets) Handle(servletCtx server.ServletCtx,
 	stopChan <-chan struct{}, doneChan chan<- struct{},
-	readChan <-chan []byte, writeChan chan<- []byte) {
+	readChan <-chan css.SocketMessage, writeChan chan<- css.SocketMessage) {
 	defer func() {
 		doneChan <- struct{}{}
 	}()
 
 	var (
-		md        metadata.MD
-		src       crp.ServerRequestCodec
-		method    string
-		params    []string
-		grpcCtx   context.Context
-		grpcReply string
-		replyBuff []byte
-		err       error
+		md          metadata.MD
+		src         crp.ServerRequestCodec
+		messageType int
+		message     []byte
+		method      string
+		params      []string
+		grpcCtx     context.Context
+		grpcReply   string
+		replyBuff   []byte
+		err         error
 	)
 
 	_clientType := servletCtx.GetAttribute(og.SessionClientTypeKey)
@@ -90,12 +92,15 @@ func (s *RPCServlets) Handle(servletCtx server.ServletCtx,
 
 	for {
 		select {
-		case msg, ok := <-readChan:
+		case socketMessage, ok := <-readChan:
 			if !ok {
 				return
 			}
+
+			messageType, message = socketMessage()
+
 			// grpc exec method call
-			src, err = s.RPCServerCodec.NewRequest(msg)
+			src, err = s.RPCServerCodec.NewRequest(messageType, message)
 			if nil != err {
 				logging.Logger().Error(err)
 				break
@@ -118,14 +123,14 @@ func (s *RPCServlets) Handle(servletCtx server.ServletCtx,
 			if !src.HasResponse() {
 				break
 			}
-			replyBuff, err = src.NewResponseWithString(grpcReply, err)
+			messageType, replyBuff, err = src.NewResponseWithString(grpcReply, err)
 			if nil != err {
 				logging.Logger().Error(err)
 				s.writeError(src, writeChan, crp.E_INTERNAL, "", err)
 				break
 			}
 
-			writeChan <- replyBuff
+			writeChan <- css.MakeSocketMessage(messageType, replyBuff)
 		case <-stopChan:
 			return
 		}
@@ -134,7 +139,7 @@ func (s *RPCServlets) Handle(servletCtx server.ServletCtx,
 
 }
 
-func (s *RPCServlets) writeError(src crp.ServerRequestCodec, writeChan chan<- []byte, code crp.ErrorCode, message string, data interface{}) {
+func (s *RPCServlets) writeError(src crp.ServerRequestCodec, writeChan chan<- css.SocketMessage, code crp.ErrorCode, message string, data interface{}) {
 	if !src.HasResponse() {
 		return
 	}
@@ -145,12 +150,12 @@ func (s *RPCServlets) writeError(src crp.ServerRequestCodec, writeChan chan<- []
 		Data:    data,
 	}
 
-	buf, err := src.NewResponse(nil, pErr)
+	messageType, buf, err := src.NewResponse(nil, pErr)
 	if nil != err {
 		logging.Logger().Error(err)
 		return
 	}
-	writeChan <- buf
+	writeChan <- css.MakeSocketMessage(messageType, buf)
 }
 
 func (s *RPCServlets) GetSessions(sessionIDs []string) []*Session {