diff --git a/README.md b/README.md
index c72d6bd..be56fdc 100644
--- a/README.md
+++ b/README.md
@@ -6,3 +6,7 @@
  - Synchronise date of births from a vcard file
 
 Some other features are planned, mainly around using external libraries. Feature ideas and contributions welcome.
+
+## Immich API bindings
+
+The bindings are generated automatically from `src/immich-openapi-specs.json`. The file currently in the repo has been generated with Immich v1.118.0, with a few methods removed around file upload (Progenitor doesn't yet support `multipart/form-data` content types, see [here](https://github.com/oxidecomputer/progenitor/issues/518)). All other methods should be available.