diff --git a/include/Configuration.h b/include/Configuration.h
index ed0ddd7..fc4867f 100644
--- a/include/Configuration.h
+++ b/include/Configuration.h
@@ -19,7 +19,7 @@
 #define MQTT_MAX_PASSWORD_STRLEN 64
 #define MQTT_MAX_TOPIC_STRLEN 32
 #define MQTT_MAX_LWTVALUE_STRLEN 20
-#define MQTT_MAX_ROOT_CA_CERT_STRLEN 2048
+#define MQTT_MAX_ROOT_CA_CERT_STRLEN 2560
 
 #define INV_MAX_NAME_STRLEN 31
 #define INV_MAX_COUNT 10
diff --git a/webapp/src/views/MqttAdminView.vue b/webapp/src/views/MqttAdminView.vue
index 5d1e47b..1c6cde9 100644
--- a/webapp/src/views/MqttAdminView.vue
+++ b/webapp/src/views/MqttAdminView.vue
@@ -59,7 +59,7 @@
                 <InputElement v-show="mqttConfigList.mqtt_tls"
                               :label="$t('mqttadmin.RootCa')"
                               v-model="mqttConfigList.mqtt_root_ca_cert"
-                              type="textarea" maxlength="2048" rows="10"/>
+                              type="textarea" maxlength="2560" rows="10"/>
             </CardElement>
 
             <CardElement :text="$t('mqttadmin.LwtParameters')" textVariant="text-bg-primary" add-space