diff --git a/src/ems-esp.cpp b/src/ems-esp.cpp
index 7f3b482af..6e288d748 100644
--- a/src/ems-esp.cpp
+++ b/src/ems-esp.cpp
@@ -556,7 +556,7 @@ void publishSensorValues() {
         return; // no sensors attached
     }
 
-    StaticJsonDocument<200> doc;
+    StaticJsonDocument<600> doc;
     JsonObject              sensors = doc.to<JsonObject>();
 
     bool hasdata     = false;