diff --git a/README.md b/README.md
index a251125a..8665944a 100644
--- a/README.md
+++ b/README.md
@@ -22,6 +22,10 @@ longer receiving updates. It is available on
 [old versions](https://github.com/stripe/openapi/tree/v83) of this repository.
 
 
+The specs provided in this repository do not explicity target
+[openapi-generator](https://github.com/OpenAPITools/openapi-generator).  They are instead generated via a custom closed-source
+generator.
+
 ## Vendor Extensions
 
 The specification ships with a few vendor-specific fields to help represent