diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4b9efaee..28356637 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+## [v2.7.2] - 2019-07-30
+
+### Fixed:
+- **[dnsprovider]** vultr: quote TXT record
+
 ## [v2.7.1] - 2019-07-22
 
 ### Fixed:
diff --git a/acme/api/internal/sender/useragent.go b/acme/api/internal/sender/useragent.go
index 85570817..9b3452f1 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/2.7.1"
+	ourUserAgent = "xenolf-acme/2.7.2"
 
 	// 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"
 )