diff --git a/data/telegram-mtproto/GetConfig.json b/data/telegram-mtproto/GetConfig.json
index 7f9c55b66e..e4ddae42a0 100644
--- a/data/telegram-mtproto/GetConfig.json
+++ b/data/telegram-mtproto/GetConfig.json
@@ -32,7 +32,7 @@
     "call_connect_timeout_ms": 30000,
     "call_packet_timeout_ms": 10000,
     "me_url_prefix": "https://t.me/",
-    "caption_length_max": 4096,
+    "caption_length_max": 1024,
     "message_length_max": 4096,
     "webfile_dc_id": 4,
     "phonecalls_enabled": true,