diff --git a/protocol/errors.json b/protocol/errors.json
index 4a9cb8b..99a24cb 100644
--- a/protocol/errors.json
+++ b/protocol/errors.json
@@ -91,6 +91,7 @@
   "42912": "there is a channel iteration call already in progress; only 1 active call is permitted to execute at any one time",
   "42920": "rate limit exceeded (fatal)",
   "42921": "max per-connection publish rate limit exceeded (fatal); closing connection",
+  "42922": "rate limit exceeded; too many requests",
 
   "50000": "internal error",
   "50001": "internal channel error",
diff --git a/protocol/errorsHelp.json b/protocol/errorsHelp.json
index 47ba3c7..b4e0c9c 100644
--- a/protocol/errorsHelp.json
+++ b/protocol/errorsHelp.json
@@ -45,6 +45,7 @@
   "42910": "https://faqs.ably.com/error-code-42910-rate-limit-exceeded-request-rejected",
   "42911": "https://faqs.ably.com/error-code-42911-maximum-account-wide-instantaneous-messages-rate-exceeded",
   "42912": "https://faqs.ably.com/error-code-42912-channel-iteration-call-already-in-progress",
+  "42922": "https://faqs.ably.com/error-code-42922-rate-limit-exceeded-request-rejected",
   "500": "https://faqs.ably.com/error-code-500",
   "50000": "https://faqs.ably.com/error-code-50000-internal-error",
   "50001": "https://faqs.ably.com/error-code-50001-internal-channel-error",