diff --git a/wled00/const.h b/wled00/const.h
index d338e9303..51c3d496a 100644
--- a/wled00/const.h
+++ b/wled00/const.h
@@ -301,6 +301,12 @@
   #define JSON_BUFFER_SIZE 20480
 #endif
 
+#ifdef WLED_USE_DYNAMIC_JSON
+  #define MIN_HEAP_SIZE JSON_BUFFER_SIZE+512
+#else
+  #define MIN_HEAP_SIZE 4096
+#endif
+
 // Maximum size of node map (list of other WLED instances)
 #ifdef ESP8266
   #define WLED_MAX_NODES 24
diff --git a/wled00/wled.cpp b/wled00/wled.cpp
index 1fb1565a9..2a80ccce8 100644
--- a/wled00/wled.cpp
+++ b/wled00/wled.cpp
@@ -626,7 +626,7 @@ void WLED::handleConnection()
   // reconnect WiFi to clear stale allocations if heap gets too low
   if (now - heapTime > 5000) {
     uint32_t heap = ESP.getFreeHeap();
-    if (heap < JSON_BUFFER_SIZE+512 && lastHeap < JSON_BUFFER_SIZE+512) {
+    if (heap < MIN_HEAP_SIZE && lastHeap < MIN_HEAP_SIZE) {
       DEBUG_PRINT(F("Heap too low! "));
       DEBUG_PRINTLN(heap);
       forceReconnect = true;