diff --git a/include/Configuration.h b/include/Configuration.h
index f8673edb..cd925dcc 100644
--- a/include/Configuration.h
+++ b/include/Configuration.h
@@ -22,7 +22,7 @@
 #define MQTT_MAX_CERT_STRLEN 2560
 
 #define INV_MAX_NAME_STRLEN 31
-#define INV_MAX_COUNT 10
+#define INV_MAX_COUNT 5
 #define INV_MAX_CHAN_COUNT 6
 
 #define CHAN_MAX_NAME_STRLEN 31
diff --git a/src/WebApi_prometheus.cpp b/src/WebApi_prometheus.cpp
index aee56847..ab925f72 100644
--- a/src/WebApi_prometheus.cpp
+++ b/src/WebApi_prometheus.cpp
@@ -27,7 +27,7 @@ void WebApiPrometheusClass::loop()
 void WebApiPrometheusClass::onPrometheusMetricsGet(AsyncWebServerRequest* request)
 {
     try {
-        auto stream = request->beginResponseStream("text/plain; charset=utf-8", 40960);
+        auto stream = request->beginResponseStream("text/plain; charset=utf-8", 4096 * INV_MAX_COUNT); // TODO helge: check if this calculation is correct
 
         stream->print("# HELP opendtu_build Build info\n");
         stream->print("# TYPE opendtu_build gauge\n");
diff --git a/src/WebApi_ws_live.cpp b/src/WebApi_ws_live.cpp
index 102ad53d..b5146455 100644
--- a/src/WebApi_ws_live.cpp
+++ b/src/WebApi_ws_live.cpp
@@ -69,7 +69,7 @@ void WebApiWsLiveClass::loop()
             String buffer;
             // free JsonDocument as soon as possible
             {
-                DynamicJsonDocument root(40960);
+                DynamicJsonDocument root(4096 * INV_MAX_COUNT); // TODO helge: check if this calculation is correct
                 JsonVariant var = root;
                 generateJsonResponse(var);
                 serializeJson(root, buffer);