diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2ec87f5d66..eb08e6414d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,7 @@
 
 Nokogiri follows [Semantic Versioning](https://semver.org/), please see the [README.md](README.md) for details.
 
-## 1.12.next / unreleased
+## 1.12.5 / 2021-09-27
 
 ### Security
 
diff --git a/lib/nokogiri/version/constant.rb b/lib/nokogiri/version/constant.rb
index 3aa842cfe1..c6b1a69c42 100644
--- a/lib/nokogiri/version/constant.rb
+++ b/lib/nokogiri/version/constant.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 module Nokogiri
   # The version of Nokogiri you are using
-  VERSION = "1.12.4"
+  VERSION = "1.12.5"
 end