diff --git a/core/opentelemetry/agent.go b/core/opentelemetry/agent.go
index 5dd518d5..1197bd62 100644
--- a/core/opentelemetry/agent.go
+++ b/core/opentelemetry/agent.go
@@ -55,6 +55,5 @@ func StartAgent(c Config) {
 		otel.SetTextMapPropagator(propagation.NewCompositeTextMapPropagator(propagation.TraceContext{}, propagation.Baggage{}))
 
 		enabled.Set(true)
-
 	})
 }
diff --git a/core/opentelemetry/clientstream.go b/core/opentelemetry/clientstream.go
index f292a5bb..a5a01095 100644
--- a/core/opentelemetry/clientstream.go
+++ b/core/opentelemetry/clientstream.go
@@ -67,7 +67,6 @@ func (w *clientStream) SendMsg(m interface{}) error {
 
 func (w *clientStream) Header() (metadata.MD, error) {
 	md, err := w.ClientStream.Header()
-
 	if err != nil {
 		w.sendStreamEvent(errorEvent, err)
 	}
@@ -77,7 +76,6 @@ func (w *clientStream) Header() (metadata.MD, error) {
 
 func (w *clientStream) CloseSend() error {
 	err := w.ClientStream.CloseSend()
-
 	if err != nil {
 		w.sendStreamEvent(errorEvent, err)
 	}
diff --git a/core/opentelemetry/tracer.go b/core/opentelemetry/tracer.go
index 0273787d..ea0dfb15 100644
--- a/core/opentelemetry/tracer.go
+++ b/core/opentelemetry/tracer.go
@@ -24,7 +24,7 @@ func (s *metadataSupplier) Get(key string) string {
 	return values[0]
 }
 
-func (s *metadataSupplier) Set(key string, value string) {
+func (s *metadataSupplier) Set(key, value string) {
 	s.metadata.Set(key, value)
 }
 
@@ -35,6 +35,7 @@ func (s *metadataSupplier) Keys() []string {
 	}
 	return out
 }
+
 func Inject(ctx context.Context, p propagation.TextMapPropagator, metadata *metadata.MD) {
 	p.Inject(ctx, &metadataSupplier{
 		metadata: metadata,
diff --git a/go.mod b/go.mod
index 67319ac3..c84b4ea6 100644
--- a/go.mod
+++ b/go.mod
@@ -18,6 +18,7 @@ require (
 	github.com/go-xorm/builder v0.3.4
 	github.com/golang/mock v1.4.3
 	github.com/golang/protobuf v1.5.2
+	github.com/google/go-cmp v0.5.6 // indirect
 	github.com/google/uuid v1.1.2
 	github.com/iancoleman/strcase v0.1.2
 	github.com/justinas/alice v1.2.0
@@ -40,12 +41,13 @@ require (
 	go.etcd.io/etcd/api/v3 v3.5.0
 	go.etcd.io/etcd/client/v3 v3.5.0
 	go.opentelemetry.io/otel v1.0.0-RC2
-	go.opentelemetry.io/otel/exporters/jaeger v1.0.0-RC2
+	go.opentelemetry.io/otel/exporters/jaeger v1.0.0-RC2 // indirect
+	go.opentelemetry.io/otel/metric v0.20.0 // indirect
 	go.opentelemetry.io/otel/sdk v1.0.0-RC2
 	go.opentelemetry.io/otel/trace v1.0.0-RC2
 	go.uber.org/automaxprocs v1.3.0
 	golang.org/x/net v0.0.0-20210716203947-853a461950ff
-	golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c // indirect
+	golang.org/x/sys v0.0.0-20210820121016-41cdb8703e55 // indirect
 	golang.org/x/time v0.0.0-20210220033141-f8bda1e9f3ba
 	google.golang.org/genproto v0.0.0-20210722135532-667f2b7c528f // indirect
 	google.golang.org/grpc v1.39.0
diff --git a/go.sum b/go.sum
index 2b4ac855..49195145 100644
--- a/go.sum
+++ b/go.sum
@@ -247,12 +247,20 @@ go.etcd.io/etcd/client/pkg/v3 v3.5.0 h1:2aQv6F436YnN7I4VbI8PPYrBhu+SmrTaADcf8Mi/
 go.etcd.io/etcd/client/pkg/v3 v3.5.0/go.mod h1:IJHfcCEKxYu1Os13ZdwCwIUTUVGYTSAM3YSwc9/Ac1g=
 go.etcd.io/etcd/client/v3 v3.5.0 h1:62Eh0XOro+rDwkrypAGDfgmNh5Joq+z+W9HZdlXMzek=
 go.etcd.io/etcd/client/v3 v3.5.0/go.mod h1:AIKXXVX/DQXtfTEqBryiLTUXwON+GuvO6Z7lLS/oTh0=
+go.opentelemetry.io/otel v0.20.0 h1:eaP0Fqu7SXHwvjiqDq83zImeehOHX8doTvU9AwXON8g=
+go.opentelemetry.io/otel v0.20.0/go.mod h1:Y3ugLH2oa81t5QO+Lty+zXf8zC9L26ax4Nzoxm/dooo=
 go.opentelemetry.io/otel v1.0.0-RC2 h1:SHhxSjB+omnGZPgGlKe+QMp3MyazcOHdQ8qwo89oKbg=
 go.opentelemetry.io/otel v1.0.0-RC2/go.mod h1:w1thVQ7qbAy8MHb0IFj8a5Q2QU0l2ksf8u/CN8m3NOM=
 go.opentelemetry.io/otel/exporters/jaeger v1.0.0-RC2 h1:RF0nWsIDpDBe+s06lkLxUw9CWQUAhO6hBSxxB7dz45s=
 go.opentelemetry.io/otel/exporters/jaeger v1.0.0-RC2/go.mod h1:sZZqN3Vb0iT+NE6mZ1S7sNyH3t4PFk6ElK5TLGFBZ7E=
+go.opentelemetry.io/otel/metric v0.20.0 h1:4kzhXFP+btKm4jwxpjIqjs41A7MakRFUS86bqLHTIw8=
+go.opentelemetry.io/otel/metric v0.20.0/go.mod h1:598I5tYlH1vzBjn+BTuhzTCSb/9debfNp6R3s7Pr1eU=
+go.opentelemetry.io/otel/oteltest v0.20.0/go.mod h1:L7bgKf9ZB7qCwT9Up7i9/pn0PWIa9FqQ2IQ8LoxiGnw=
+go.opentelemetry.io/otel/sdk v0.20.0/go.mod h1:g/IcepuwNsoiX5Byy2nNV0ySUF1em498m7hBWC279Yc=
 go.opentelemetry.io/otel/sdk v1.0.0-RC2 h1:ROuteeSCBaZNjiT9JcFzZepmInDvLktR28Y6qKo8bCs=
 go.opentelemetry.io/otel/sdk v1.0.0-RC2/go.mod h1:fgwHyiDn4e5k40TD9VX243rOxXR+jzsWBZYA2P5jpEw=
+go.opentelemetry.io/otel/trace v0.20.0 h1:1DL6EXUdcg95gukhuRRvLDO/4X5THh/5dIV52lqtnbw=
+go.opentelemetry.io/otel/trace v0.20.0/go.mod h1:6GjCW8zgDjwGHGa6GkyeB8+/5vjT16gUEi0Nf1iBdgw=
 go.opentelemetry.io/otel/trace v1.0.0-RC2 h1:dunAP0qDULMIT82atj34m5RgvsIK6LcsXf1c/MsYg1w=
 go.opentelemetry.io/otel/trace v1.0.0-RC2/go.mod h1:JPQ+z6nNw9mqEGT8o3eoPTdnNI+Aj5JcxEsVGREIAy4=
 go.opentelemetry.io/proto/otlp v0.7.0/go.mod h1:PqfVotwruBrMGOCsRd/89rSnXhoiJIqeYNgFYFoEGnI=
@@ -335,6 +343,8 @@ golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20210603081109-ebe580a85c40/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c h1:F1jZWGFhYfh0Ci55sIpILtKKK8p3i2/krTr0H1rg74I=
 golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20210820121016-41cdb8703e55 h1:rw6UNGRMfarCepjI8qOepea/SXwIBVfTKjztZ5gBbq4=
+golang.org/x/sys v0.0.0-20210820121016-41cdb8703e55/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=