diff --git a/README.md b/README.md
index 536d5f4..723d482 100644
--- a/README.md
+++ b/README.md
@@ -8,10 +8,9 @@ stack. It provides three parts:
 - 🚌 oeffis is an optional helper library for DBus communication with the
   XDG RemoteDesktop portal (`liboeffis`)
 
-The communication between these parts is an implementation detail, neither
-client nor server need to care about the details. Let's call it the BRidge
-for EI, or 🥣 brei. In the future, 🥣 brei may become a stable protocol. For
-now, this C library is it.
+The communication between EI and EIS happens over a UNIX socket via a custom
+binary protocol. See the [EI protocol documentation](https://libinput.pages.freedesktop.org/libei/)
+for details.
 
 For the purpose of this document, **libei** refers to the project,
 `libei`/`libeis` to the libraries provided.