diff --git a/lib/ESPAsyncWebServer/AsyncJson.h b/lib/ESPAsyncWebServer/AsyncJson.h
index f7e0682b4..429ff648f 100644
--- a/lib/ESPAsyncWebServer/AsyncJson.h
+++ b/lib/ESPAsyncWebServer/AsyncJson.h
@@ -173,7 +173,7 @@ class AsyncCallbackJsonWebHandler : public AsyncWebHandler {
     ArJsonRequestHandlerFunction _onRequest;
     size_t                       _contentLength;
 #ifndef ARDUINOJSON_5_COMPATIBILITY
-    const size_t maxJsonBufferSize;
+    size_t _maxJsonBufferSize;
 #endif
     size_t _maxContentLength;
 
@@ -182,7 +182,7 @@ class AsyncCallbackJsonWebHandler : public AsyncWebHandler {
         : _uri(uri)
         , _method(HTTP_POST | HTTP_PUT | HTTP_PATCH)
         , _onRequest(onRequest)
-        , maxJsonBufferSize(maxJsonBufferSize)
+        , _maxJsonBufferSize(maxJsonBufferSize)
         , _maxContentLength(16384) {
     }
 
@@ -192,6 +192,9 @@ class AsyncCallbackJsonWebHandler : public AsyncWebHandler {
     void setMaxContentLength(int maxContentLength) {
         _maxContentLength = maxContentLength;
     }
+    void setMaxJsonBufferSize(size_t maxJsonBufferSize) {
+        _maxJsonBufferSize = maxJsonBufferSize;
+    }
     void onRequest(ArJsonRequestHandlerFunction fn) {
         _onRequest = fn;
     }
@@ -216,7 +219,7 @@ class AsyncCallbackJsonWebHandler : public AsyncWebHandler {
     virtual void handleRequest(AsyncWebServerRequest * request) override final {
         if (_onRequest) {
             if (request->_tempObject != NULL) {
-                DynamicJsonDocument  jsonBuffer(this->maxJsonBufferSize);
+                DynamicJsonDocument  jsonBuffer(this->_maxJsonBufferSize);
                 DeserializationError error = deserializeJson(jsonBuffer, (uint8_t *)(request->_tempObject));
                 if (!error) {
                     JsonVariant json = jsonBuffer.as<JsonVariant>();
diff --git a/src/web/WebCustomizationService.cpp b/src/web/WebCustomizationService.cpp
index 7564de6e5..98e060ed3 100644
--- a/src/web/WebCustomizationService.cpp
+++ b/src/web/WebCustomizationService.cpp
@@ -46,7 +46,8 @@ WebCustomizationService::WebCustomizationService(AsyncWebServer * server, FS * f
                securityManager->wrapRequest(std::bind(&WebCustomizationService::reset_customization, this, _1), AuthenticationPredicates::IS_ADMIN));
 
     _exclude_entities_handler.setMethod(HTTP_POST);
-    _exclude_entities_handler.setMaxContentLength(1024);
+    _exclude_entities_handler.setMaxContentLength(2048);
+    _exclude_entities_handler.setMaxJsonBufferSize(2048);
     server->addHandler(&_exclude_entities_handler);
 
     _device_entities_handler.setMethod(HTTP_POST);