diff --git a/CHANGELOG.md b/CHANGELOG.md
index bc9b8803d..db8975ac8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,20 @@
 # Changelog
 
+## [v4.9.1] - 2022-11-25
+
+### Changed:
+- 
+- **[lib,cname]** cname: add log about CNAME entries
+- **[dnsprovider]** regru: improve error handling
+
+### Fixed:
+- 
+- **[dnsprovider,cname]** fix CNAME support for multiple DNS providers
+- **[dnsprovider,cname]** duckdns: fix CNAME support
+- **[dnsprovider,cname]** oraclecloud: use fqdn to resolve zone
+- **[dnsprovider]** hurricane: fix CNAME support
+- **[lib,cname]** cname: stop trying to traverse cname if none have been found
+
 ## [v4.9.0] - 2022-10-03
 
 ### Added:
diff --git a/acme/api/internal/sender/useragent.go b/acme/api/internal/sender/useragent.go
index a22a4f254..260fcc090 100644
--- a/acme/api/internal/sender/useragent.go
+++ b/acme/api/internal/sender/useragent.go
@@ -5,10 +5,10 @@ package sender
 
 const (
 	// ourUserAgent is the User-Agent of this underlying library package.
-	ourUserAgent = "xenolf-acme/4.9.0"
+	ourUserAgent = "xenolf-acme/4.9.1"
 
 	// ourUserAgentComment is part of the UA comment linked to the version status of this underlying library package.
 	// values: detach|release
 	// NOTE: Update this with each tagged release.
-	ourUserAgentComment = "detach"
+	ourUserAgentComment = "release"
 )