diff --git a/lib/src/utils/filter_parser.dart b/lib/src/utils/filter_parser.dart
index bb4be62..9cdbb21 100644
--- a/lib/src/utils/filter_parser.dart
+++ b/lib/src/utils/filter_parser.dart
@@ -68,7 +68,11 @@ class FilterParser {
       return (row) => row[columnName] == null;
     } else if (postrestFilter.startsWith('in.')) {
       final value = postrestFilter.substring(3);
-      final values = value.substring(1, value.length - 1).split(',');
+      final values =
+        value.substring(1, value.length - 1)
+             .split(',')
+             .map((e) => e.replaceAll(RegExp(r'^"|"$'), ''))
+             .toList();
       return (row) => values.contains(row[columnName].toString());
     } else if (postrestFilter.startsWith('cs.')) {
       final value = postrestFilter.substring(3);
diff --git a/test/mock_supabase_http_client_test.dart b/test/mock_supabase_http_client_test.dart
index 549e4b8..3c9d250 100644
--- a/test/mock_supabase_http_client_test.dart
+++ b/test/mock_supabase_http_client_test.dart
@@ -380,6 +380,10 @@ void main() {
       final posts =
           await mockSupabase.from('posts').select().inFilter('id', [1, 2]);
       expect(posts.length, 2);
+
+      final strPosts =
+          await mockSupabase.from('posts').select().inFilter('title', ["First post"]);
+      expect(strPosts.length, 1);
     });
     group('Not filters', () {
       setUp(() async {