The list of Supported Versions may contain a single value

README.md

@@ -135,7 +135,7 @@ Location | REQUIRED| Primary city in which the system is located, followed by th
 System ID | REQUIRED | ID for the system. This MUST match the `system_id` field in `system_information.json`.
 URL | REQUIRED | URL for the system from the `url` field in `system_information.json`. If the `url` field is not included in `system_information.json` this SHOULD be the primary URL for the system operator.
 Auto-Discovery URL | REQUIRED | URL for the system's `gbfs.json` auto-discovery file.
-Supported Versions | REQUIRED | List of GBFS versions under which the feed is published. Values ​​are separated by a semi-colon surrounded with 1 space on each side for readability (" ; ").
+Supported Versions | REQUIRED | List of GBFS version(s) under which the feed is published. Multiple values ​​are separated by a semi-colon surrounded with 1 space on each side for readability (" ; ").
 Authentication Info | Conditionally REQUIRED | If authentication is required, this MUST contain a URL to a human-readable page describing how the authentication should be performed and how credentials can be created, or directly contain the public key-value pair to append to the feed URLs.
 
 ## GBFS JSON Schemas