diff --git a/protocol/json/client.go b/protocol/json/client.go
index bf52930..4330e01 100644
--- a/protocol/json/client.go
+++ b/protocol/json/client.go
@@ -166,6 +166,7 @@ func retainClientRequest(method string, params interface{}, id interface{}) *cli
 		cr = v.(*clientRequest)
 	}
 
+	cr.Version = Version
 	cr.Method = method
 	cr.Params = params
 	cr.ID = id
@@ -174,6 +175,7 @@ func retainClientRequest(method string, params interface{}, id interface{}) *cli
 }
 
 func releaseClientRequest(cr *clientRequest) {
+	cr.Version = ""
 	cr.Method = ""
 	cr.Params = nil
 	cr.ID = nil