diff --git a/pkg/rpcclient/auth.go b/pkg/rpcclient/auth.go
index fe6d8da4b..580e6bcee 100644
--- a/pkg/rpcclient/auth.go
+++ b/pkg/rpcclient/auth.go
@@ -19,7 +19,7 @@ func NewAuth(discov discoveryregistry.SvcDiscoveryRegistry) *Auth {
 }
 
 type Auth struct {
-	conn   *grpc.ClientConn
+	conn   grpc.ClientConnInterface
 	Client auth.AuthClient
 	discov discoveryregistry.SvcDiscoveryRegistry
 }
diff --git a/pkg/rpcclient/conversation.go b/pkg/rpcclient/conversation.go
index e9a7b1ea4..55ea5f829 100644
--- a/pkg/rpcclient/conversation.go
+++ b/pkg/rpcclient/conversation.go
@@ -14,7 +14,7 @@ import (
 
 type Conversation struct {
 	Client conversation.ConversationClient
-	conn   *grpc.ClientConn
+	conn   grpc.ClientConnInterface
 	discov discoveryregistry.SvcDiscoveryRegistry
 }
 
diff --git a/pkg/rpcclient/friend.go b/pkg/rpcclient/friend.go
index 299c93b00..aa7ba0344 100644
--- a/pkg/rpcclient/friend.go
+++ b/pkg/rpcclient/friend.go
@@ -11,7 +11,7 @@ import (
 )
 
 type Friend struct {
-	conn   *grpc.ClientConn
+	conn   grpc.ClientConnInterface
 	Client friend.FriendClient
 	discov discoveryregistry.SvcDiscoveryRegistry
 }
diff --git a/pkg/rpcclient/group.go b/pkg/rpcclient/group.go
index 6f87e63cc..911887dda 100644
--- a/pkg/rpcclient/group.go
+++ b/pkg/rpcclient/group.go
@@ -15,7 +15,7 @@ import (
 )
 
 type Group struct {
-	conn   *grpc.ClientConn
+	conn   grpc.ClientConnInterface
 	Client group.GroupClient
 	discov discoveryregistry.SvcDiscoveryRegistry
 }
diff --git a/pkg/rpcclient/msg.go b/pkg/rpcclient/msg.go
index a592e104d..6097109ae 100644
--- a/pkg/rpcclient/msg.go
+++ b/pkg/rpcclient/msg.go
@@ -104,7 +104,7 @@ func newSessionTypeConf() map[int32]int32 {
 }
 
 type Message struct {
-	conn   *grpc.ClientConn
+	conn   grpc.ClientConnInterface
 	Client msg.MsgClient
 	discov discoveryregistry.SvcDiscoveryRegistry
 }
diff --git a/pkg/rpcclient/push.go b/pkg/rpcclient/push.go
index 3c9736cc2..8ac20b943 100644
--- a/pkg/rpcclient/push.go
+++ b/pkg/rpcclient/push.go
@@ -10,7 +10,7 @@ import (
 )
 
 type Push struct {
-	conn   *grpc.ClientConn
+	conn   grpc.ClientConnInterface
 	Client push.PushMsgServiceClient
 	discov discoveryregistry.SvcDiscoveryRegistry
 }
diff --git a/pkg/rpcclient/third.go b/pkg/rpcclient/third.go
index a59a5adb4..46c5e1b92 100644
--- a/pkg/rpcclient/third.go
+++ b/pkg/rpcclient/third.go
@@ -10,7 +10,7 @@ import (
 )
 
 type Third struct {
-	conn   *grpc.ClientConn
+	conn   grpc.ClientConnInterface
 	Client third.ThirdClient
 	discov discoveryregistry.SvcDiscoveryRegistry
 }
diff --git a/pkg/rpcclient/user.go b/pkg/rpcclient/user.go
index d717ba6f3..76fea81dd 100644
--- a/pkg/rpcclient/user.go
+++ b/pkg/rpcclient/user.go
@@ -15,7 +15,7 @@ import (
 )
 
 type User struct {
-	conn   *grpc.ClientConn
+	conn   grpc.ClientConnInterface
 	Client user.UserClient
 	discov discoveryregistry.SvcDiscoveryRegistry
 }