diff --git a/main/main.ino b/main/main.ino
index 6ba81ca..ad4da10 100644
--- a/main/main.ino
+++ b/main/main.ino
@@ -137,7 +137,7 @@ unsigned long timer_sys_measures = 0;
 void callback(char* topic, byte* payload, unsigned int length);
 
 char mqtt_user[parameters_size] = MQTT_USER; // not compulsory only if your broker needs authentication
-char mqtt_pass[parameters_size] = MQTT_PASS; // not compulsory only if your broker needs authentication
+char mqtt_pass[parameters_size * 2] = MQTT_PASS; // not compulsory only if your broker needs authentication
 char mqtt_server[parameters_size] = MQTT_SERVER;
 char mqtt_port[6] = MQTT_PORT;
 char mqtt_topic[mqtt_topic_max_size] = Base_Topic;
@@ -953,7 +953,7 @@ void setup_wifimanager(bool reset_settings) {
   WiFiManagerParameter custom_mqtt_server("server", "mqtt server", mqtt_server, parameters_size);
   WiFiManagerParameter custom_mqtt_port("port", "mqtt port", mqtt_port, 6);
   WiFiManagerParameter custom_mqtt_user("user", "mqtt user", mqtt_user, parameters_size);
-  WiFiManagerParameter custom_mqtt_pass("pass", "mqtt pass", mqtt_pass, parameters_size);
+  WiFiManagerParameter custom_mqtt_pass("pass", "mqtt pass", mqtt_pass, parameters_size * 2);
   WiFiManagerParameter custom_mqtt_topic("topic", "mqtt base topic", mqtt_topic, mqtt_topic_max_size);
   WiFiManagerParameter custom_gateway_name("name", "gateway name", gateway_name, parameters_size * 2);