diff --git a/index.html b/index.html
index 6764d70..051b4e4 100644
--- a/index.html
+++ b/index.html
@@ -410,8 +410,12 @@
                 }
 
                 // enter dfu mode
+                console.log("entering dfu mode");
                 const flasher = new Nrf52DfuFlasher(serialPort);
                 await flasher.enterDfuMode();
+                console.log("entering dfu mode: done");
+
+                alert("Device should now be in DFU mode.");
 
             },
             async flash() {