diff --git a/main/main.ino b/main/main.ino
index af17887..a996ea7 100644
--- a/main/main.ino
+++ b/main/main.ino
@@ -1377,7 +1377,7 @@ void setup_wifimanager(bool reset_settings) {
   WiFiManagerParameter custom_mqtt_pass("pass", "mqtt pass", mqtt_pass, parameters_size);
   WiFiManagerParameter custom_mqtt_topic("topic", "mqtt base topic", mqtt_topic, mqtt_topic_max_size);
   WiFiManagerParameter custom_mqtt_secure("secure", "mqtt secure", "1", 2, mqtt_secure ? "type=\"checkbox\" checked" : "type=\"checkbox\"");
-  WiFiManagerParameter custom_mqtt_cert("cert", "<br/>mqtt broker cert", mqtt_cert.c_str(), 2048);
+  WiFiManagerParameter custom_mqtt_cert("cert", "<br/>mqtt broker cert", mqtt_cert.c_str(), 4096);
   WiFiManagerParameter custom_gateway_name("name", "gateway name", gateway_name, parameters_size);
   WiFiManagerParameter custom_ota_pass("ota", "ota password", ota_pass, parameters_size);
 #  endif