diff --git a/README.md b/README.md
index bec65da..656ae33 100644
--- a/README.md
+++ b/README.md
@@ -10,3 +10,7 @@ See cli/README.md for more documentation on the library.
 * cli: Test the updater library via the Rust API (for development).
 * dart_cli: Test ffi wrapping of updater library.
 * library: The rust library that does the actual update work.
+* dart_bindings: The Dart bindings for the updater library.
+
+All of the interesting code is in the `library` directory.  There is also
+a README.md in that directory explaining the design.