diff --git a/src/AmsToMqttBridge.ino b/src/AmsToMqttBridge.ino
index f68d11d8..959b58d3 100644
--- a/src/AmsToMqttBridge.ino
+++ b/src/AmsToMqttBridge.ino
@@ -36,7 +36,7 @@ AmsWebServer ws;
 
 // WiFi client and MQTT client
 WiFiClient *client;
-MQTTClient mqtt(512);
+MQTTClient mqtt(384);
 
 // Object used for debugging
 Stream* debugger = NULL;
@@ -306,7 +306,7 @@ void readHanPort() {
 			if (debugger) debugger->println(time);
 
 			// Define a json object to keep the data
-			StaticJsonDocument<1024> json;
+			StaticJsonDocument<512> json;
 
 			// Any generic useful info here
 			json["id"] = WiFi.macAddress();
diff --git a/src/web/AmsWebServer.cpp b/src/web/AmsWebServer.cpp
index 38822033..1263edc7 100644
--- a/src/web/AmsWebServer.cpp
+++ b/src/web/AmsWebServer.cpp
@@ -35,7 +35,7 @@ void AmsWebServer::loop() {
 	server.handleClient();
 }
 
-void AmsWebServer::setJson(StaticJsonDocument<1024> json) {
+void AmsWebServer::setJson(StaticJsonDocument<512> json) {
 	if(!json.isNull()) {
 		p = json["data"]["P"].as<int>();
 		po = json["data"]["PO"].as<int>();
diff --git a/src/web/AmsWebServer.h b/src/web/AmsWebServer.h
index e43d4aea..f908bcee 100644
--- a/src/web/AmsWebServer.h
+++ b/src/web/AmsWebServer.h
@@ -28,7 +28,7 @@ class AmsWebServer {
 public:
     void setup(AmsConfiguration* config, Stream* debugger, MQTTClient* mqtt);
     void loop();
-	void setJson(StaticJsonDocument<1024> json);
+	void setJson(StaticJsonDocument<512> json);
 
 private:
 	HwTools hw;