diff --git a/date.go b/date.go
index fc97213..0009e96 100644
--- a/date.go
+++ b/date.go
@@ -23,3 +23,11 @@ func (d *Date) Decode(de *jx.Decoder) error {
 	d.Time, err = time.Parse("2006-01-02", value)
 	return err
 }
+
+func (d *Date) MarshalJSON() ([]byte, error) {
+	return []byte{0x00, 0x01, 0x02}, nil
+}
+
+func (d *Date) UnmarshalJSON(data []byte) error {
+	return nil
+}
diff --git a/decimal.go b/decimal.go
index cbf7368..b039a15 100644
--- a/decimal.go
+++ b/decimal.go
@@ -40,3 +40,11 @@ func (o *Decimal) Decode(d *jx.Decoder) error {
 	})
 	return err
 }
+
+func (d *Decimal) MarshalJSON() ([]byte, error) {
+	return []byte{0x00, 0x01, 0x02}, nil
+}
+
+func (d *Decimal) UnmarshalJSON(data []byte) error {
+	return nil
+}