diff --git a/CHANGELOG.md b/CHANGELOG.md
index 794d5752..6d920d3e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Change Log
 
+## [1.2.10](https://github.com/ably/ably-go/tree/v1.2.10)
+
+[Full Changelog](https://github.com/ably/ably-go/compare/v1.2.9...v1.2.10)
+
+**Implemented enhancements:**
+
+- Implement `RSC15l4` \(retry requests on Cloudfront HTTP error\) [\#571](https://github.com/ably/ably-go/issues/571), in [\#572](https://github.com/ably/ably-go/pull/572) ([owenpearson](https://github.com/owenpearson), [sacOO7](https://github.com/sacOO7))
+
 ## [1.2.9](https://github.com/ably/ably-go/tree/v1.2.9)
 
 [Full Changelog](https://github.com/ably/ably-go/compare/v1.2.8...v1.2.9)
diff --git a/ably/proto_http.go b/ably/proto_http.go
index be173171..6daabb4a 100644
--- a/ably/proto_http.go
+++ b/ably/proto_http.go
@@ -10,7 +10,7 @@ const (
 	ablyVersionHeader      = "X-Ably-Version"
 	ablyErrorCodeHeader    = "X-Ably-Errorcode"
 	ablyErrorMessageHeader = "X-Ably-Errormessage"
-	libraryVersion         = "1.2.9"
+	libraryVersion         = "1.2.10"
 	libraryName            = "go"
 	ablyVersion            = "1.2"
 	ablyClientIDHeader     = "X-Ably-ClientId"