diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1f2cd078..1c33a2f3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changelog
 
-## [v4.5.0] - 2021-09-30
+## [v4.5.1] - 2021-09-01
 
 ### Added:
 
@@ -30,6 +30,10 @@
 - **[lib]** lib: use permanent error instead of context cancellation
 - **[dnsprovider]** desec: bump to v0.6.0
 
+## [v4.5.0] - 2021-09-30
+
+Cancel due to a CI issue, replaced by v4.5.1.
+
 ## [v4.4.0] - 2021-06-08
 
 ### Added:
diff --git a/acme/api/internal/sender/useragent.go b/acme/api/internal/sender/useragent.go
index 90fac8a5..3156c6c7 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/4.4.1"
+	ourUserAgent = "xenolf-acme/4.4.2"
 
 	// 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"
 )