diff --git a/pkg/attr/attr.go b/pkg/attr/attr.go
index e0137c5..2773e7a 100644
--- a/pkg/attr/attr.go
+++ b/pkg/attr/attr.go
@@ -142,7 +142,7 @@ func JsonAttr(key string, jsonEl map[string]interface{}) attribute.KeyValue {
 
 // Create an arbitrary attribute with value marshalled to json.
 // In case of marshalling error, it is returned in place of value.
-func Json[M json.Marshaler](key string, val M) attribute.KeyValue {
+func Json(key string, val any) attribute.KeyValue {
 	data, err := json.Marshal(val)
 	if err != nil {
 		return attribute.KeyValue{Key: attribute.Key(key), Value: attribute.StringValue(err.Error())}