diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4adca95..1cb4423 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,13 +3,15 @@ All notable changes to this project will be documented in this file.
 
 This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased](https://github.com/alexdlaird/pyngrok/compare/5.2.2...HEAD)
+## [Unreleased](https://github.com/alexdlaird/pyngrok/compare/6.0.0...HEAD)
+
+## [6.0.0](https://github.com/alexdlaird/pyngrok/compare/5.2.2...6.0.0) - TBD
 ### Changed
 - Changed default installer behavior to download `ngrok` v3 when no version is specified.
 - Documentation updates.
 - Test updates.
 
-## [5.2.1](https://github.com/alexdlaird/pyngrok/compare/5.2.1...5.2.2) - TBD
+## [5.2.2](https://github.com/alexdlaird/pyngrok/compare/5.2.1...5.2.2) - TBD
 - Documentation improvements.
 - Test improvements.
 
diff --git a/SECURITY.md b/SECURITY.md
index f4b24a6..68de409 100644
--- a/SECURITY.md
+++ b/SECURITY.md
@@ -4,6 +4,7 @@
 
 | Version | Supported          |
 |---------|--------------------|
+| 6.0.x   | :white_check_mark: |
 | 5.2.x   | :white_check_mark: |
 | 5.1.x   | :x:                |
 | 5.0.x   | :x:                |