diff --git a/examples/esp8266/WebSocketClientSocketIO/WebSocketClientSocketIO.ino b/examples/esp8266/WebSocketClientSocketIO/WebSocketClientSocketIO.ino
index 343b5f5..06f7616 100644
--- a/examples/esp8266/WebSocketClientSocketIO/WebSocketClientSocketIO.ino
+++ b/examples/esp8266/WebSocketClientSocketIO/WebSocketClientSocketIO.ino
@@ -110,7 +110,7 @@ void loop() {
 
         // add payload (parameters) for the event
         JsonObject param1 = array.createNestedObject();
-        param1["now"] = now;
+        param1["now"] = (uint32_t) now;
 
         // JSON to String (serializion)
         String output;