diff --git a/rpc/packages.go b/rpc/packages.go
index e5ed995e7c..d371c4ca19 100644
--- a/rpc/packages.go
+++ b/rpc/packages.go
@@ -197,6 +197,13 @@ type NewTxArgs struct {
 // 	Hash string
 // }
 
+func (obj *NewTxArgs) UnmarshalJSON(b []byte) (err error) {
+	if err = json.Unmarshal(b, obj); err == nil {
+		return
+	}
+	return NewErrorResponse(ErrorDecodeArgs)
+}
+
 func (a *NewTxArgs) requirements() error {
 	if a.Recipient == "" {
 		return NewErrorResponse("Transact requires a 'recipient' address as argument")
@@ -233,6 +240,15 @@ type PushTxArgs struct {
 	Tx string `json:"tx"`
 }
 
+func (obj *PushTxArgs) UnmarshalJSON(b []byte) (err error) {
+	arg0 := ""
+	if err = json.Unmarshal(b, arg0); err == nil {
+		obj.Tx = arg0
+		return
+	}
+	return NewErrorResponse(ErrorDecodeArgs)
+}
+
 func (a *PushTxArgs) requirementsPushTx() error {
 	if a.Tx == "" {
 		return NewErrorResponse("PushTx requires a 'tx' as argument")