diff --git a/dataext/optional.go b/dataext/optional.go
index ed89bf8..f4bad9a 100644
--- a/dataext/optional.go
+++ b/dataext/optional.go
@@ -3,19 +3,9 @@ package dataext
 import (
 	"encoding/json"
 	"errors"
-	"gogs.mikescher.com/BlackForestBytes/goext/langext"
 )
 
-type JsonTwoWayMarshal interface {
-	json.Marshaler
-	json.Unmarshaler
-}
-
-type JsonOptType interface {
-	JsonTwoWayMarshal | ~string | ~bool | langext.NumberConstraint
-}
-
-type JsonOpt[T JsonOptType] struct {
+type JsonOpt[T any] struct {
 	isSet bool
 	value T
 }
diff --git a/goextVersion.go b/goextVersion.go
index 8fc3c96..330419b 100644
--- a/goextVersion.go
+++ b/goextVersion.go
@@ -1,5 +1,5 @@
 package goext
 
-const GoextVersion = "0.0.420"
+const GoextVersion = "0.0.421"
 
-const GoextVersionTimestamp = "2024-03-23T18:01:41+0100"
+const GoextVersionTimestamp = "2024-03-23T20:28:51+0100"