diff --git a/src/main.cpp b/src/main.cpp
index 62f4e75..9b65884 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -337,7 +337,7 @@ void setup() {
   });
 
   server.onNotFound([](AsyncWebServerRequest *request){
-    request->send(404, "text/plain", "The content you are looking for was not found.");
+    request->send(200, "application/json", "{'msg':'The content you are looking for was not found'}");
   });
 
   // Send a GET request to <ESP_IP>/gpio?output=<inputMessage1>&state=<inputMessage2>