diff --git a/packages/postgrest/lib/src/postgrest_filter_builder.dart b/packages/postgrest/lib/src/postgrest_filter_builder.dart
index 38e23916..59a150b2 100644
--- a/packages/postgrest/lib/src/postgrest_filter_builder.dart
+++ b/packages/postgrest/lib/src/postgrest_filter_builder.dart
@@ -228,7 +228,7 @@ class PostgrestFilterBuilder<T> extends PostgrestTransformBuilder<T> {
   ///     .isFilter('data', null);
   /// ```
   // ignore: non_constant_identifier_names
-  PostgrestFilterBuilder<T> isFilter(String column, Object? value) {
+  PostgrestFilterBuilder<T> isFilter(String column, bool? value) {
     return copyWithUrl(appendSearchParams(column, 'is.$value'));
   }