diff --git a/src/sinol_make/util.py b/src/sinol_make/util.py
index 8bf300b6..68c2f4f9 100644
--- a/src/sinol_make/util.py
+++ b/src/sinol_make/util.py
@@ -59,6 +59,10 @@ def save_config(config):
         "title",
         "title_pl",
         "title_en",
+        "sinol_task_id",
+        "sinol_contest_type",
+        "sinol_undocumented_time_tool",
+        "sinol_undocumented_test_limits",
         "memory_limit",
         "memory_limits",
         "time_limit",