diff --git a/td/generate/scheme/td_api.tl b/td/generate/scheme/td_api.tl
index 7dca44ae9..7908fdd88 100644
--- a/td/generate/scheme/td_api.tl
+++ b/td/generate/scheme/td_api.tl
@@ -8344,7 +8344,7 @@ editMessageSchedulingState chat_id:int53 message_id:int53 scheduling_state:Messa
 //@description Changes the fact-check of a message. Can be only used if getOption("can_edit_fact_check") == true
 //@chat_id The channel chat the message belongs to
 //@message_id Identifier of the message
-//@text New text of the fact-check; 0-1024 characters; pass null to remove it. Only Bold, Italic, and TextUrl entities are supported
+//@text New text of the fact-check; 0-getOption("fact_check_length_max") characters; pass null to remove it. Only Bold, Italic, and TextUrl entities are supported
 setMessageFactCheck chat_id:int53 message_id:int53 text:formattedText = Ok;
 
 
diff --git a/td/telegram/ConfigManager.cpp b/td/telegram/ConfigManager.cpp
index 57c84a695..85e8af650 100644
--- a/td/telegram/ConfigManager.cpp
+++ b/td/telegram/ConfigManager.cpp
@@ -2001,6 +2001,11 @@ void ConfigManager::process_app_config(tl_object_ptr<telegram_api::JSONValue> &c
         can_edit_fact_check = get_json_value_bool(std::move(key_value->value_), key);
         continue;
       }
+      if (key == "factcheck_length_limit") {
+        G()->set_option_integer("fact_check_length_max",
+                                get_json_value_int(std::move(key_value->value_), key));
+        continue;
+      }
 
       new_values.push_back(std::move(key_value));
     }
diff --git a/td/telegram/ConfigManager.h b/td/telegram/ConfigManager.h
index 2f7789542..0acfb299f 100644
--- a/td/telegram/ConfigManager.h
+++ b/td/telegram/ConfigManager.h
@@ -85,7 +85,7 @@ class ConfigManager final : public NetQueryCallback {
 
  private:
   struct AppConfig {
-    static constexpr int32 CURRENT_VERSION = 45;
+    static constexpr int32 CURRENT_VERSION = 46;
     int32 version_ = 0;
     int32 hash_ = 0;
     telegram_api::object_ptr<telegram_api::JSONValue> config_;
diff --git a/td/telegram/OptionManager.cpp b/td/telegram/OptionManager.cpp
index 403a73cb5..6e1245da1 100644
--- a/td/telegram/OptionManager.cpp
+++ b/td/telegram/OptionManager.cpp
@@ -150,6 +150,7 @@ OptionManager::OptionManager(Td *td)
   set_default_integer_option("upload_premium_speedup_notify_period", 3600);
   set_default_integer_option("business_chat_link_count_max", is_test_dc ? 5 : 100);
   set_default_integer_option("pinned_story_count_max", 3);
+  set_default_integer_option("fact_check_length_max", 1024);
 
   if (options.isset("my_phone_number") || !options.isset("my_id")) {
     update_premium_options();