diff --git a/src/EMSESPAPIService.cpp b/src/EMSESPAPIService.cpp
index 907f60a7f..e8e1c8ba2 100644
--- a/src/EMSESPAPIService.cpp
+++ b/src/EMSESPAPIService.cpp
@@ -109,6 +109,7 @@ void EMSESPAPIService::emsespAPIService(AsyncWebServerRequest * request) {
 
     // if we have returned data in JSON format, send this to the WEB
     if (output.size()) {
+        doc.shrinkToFit();
         char buffer[EMSESP_MAX_JSON_SIZE_LARGE];
         serializeJson(doc, buffer);
         request->send(200, "text/plain", buffer);