diff --git a/cql3/statements/update_statement.cc b/cql3/statements/update_statement.cc
index 6e0bc33150..f66d220fae 100644
--- a/cql3/statements/update_statement.cc
+++ b/cql3/statements/update_statement.cc
@@ -181,7 +181,7 @@ void update_statement::add_update_for_key(mutation& m, const query::clustering_r
 
 modification_statement::json_cache_opt insert_prepared_json_statement::maybe_prepare_json_cache(const query_options& options) const {
     sstring json_string = utf8_type->to_string(to_bytes(expr::evaluate_to_raw_view(_term, options)));
-    return json_helpers::parse(std::move(json_string), s->all_columns(), options.get_cql_serialization_format());
+    return json_helpers::parse(std::move(json_string), s->all_columns(), cql_serialization_format::internal());
 }
 
 void
@@ -212,7 +212,7 @@ insert_prepared_json_statement::execute_set_value(mutation& m, const clustering_
         return;
     }
 
-    cql_serialization_format sf = params._options.get_cql_serialization_format();
+    cql_serialization_format sf = cql_serialization_format::internal();
     visit(*column.type, make_visitor(
     [&] (const list_type_impl& ltype) {
         auto val = ::make_shared<lists::value>(lists::value::from_serialized(raw_value_view::make_value(*value), ltype, sf));