diff --git a/tools/serial/README.md b/tools/serial/README.md
index f7e184a9a8..6a2950a1da 100644
--- a/tools/serial/README.md
+++ b/tools/serial/README.md
@@ -15,4 +15,7 @@ The serial is available on the [comma shop](https://comma.ai/shop/products/comma
 ```
 sudo screen /dev/ttyUSB0 115200
 ```
-or use `connect.sh` to run the previous command in a loop
+or use `connect.sh` to run the previous command in a loop.
+
+
+The username and password are both `comma`.