diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9996f412c1..481f837e64 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,7 @@ Nokogiri follows [Semantic Versioning](https://semver.org/), please see the [REA
 
 ---
 
-## 1.13.9 / unreleased
+## 1.13.9 / 2022-10-18
 
 ### Security
 
diff --git a/lib/nokogiri/version/constant.rb b/lib/nokogiri/version/constant.rb
index 09f6faabd8..d06e7a9534 100644
--- a/lib/nokogiri/version/constant.rb
+++ b/lib/nokogiri/version/constant.rb
@@ -2,5 +2,5 @@
 
 module Nokogiri
   # The version of Nokogiri you are using
-  VERSION = "1.13.8"
+  VERSION = "1.13.9"
 end