diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5bcf34e..a5a8bc4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 This project follows [Semantic Versioning 2.0.0](http://semver.org/).
 
 ## <a name="unreleased"></a>Unreleased
+* Revert V059 level from PATCH to MAJOR
 
 ## <a name="v0.12.1"></a>v0.12.1 (2018-02-08)
 [Full Changelog](https://github.com/tomzx/php-semver-checker-git/compare/v0.12.0...v0.12.1)
diff --git a/docs/Ruleset.md b/docs/Ruleset.md
index dc738a4..607b7fc 100644
--- a/docs/Ruleset.md
+++ b/docs/Ruleset.md
@@ -143,7 +143,7 @@ V051 | ----- | *REMOVED*
 V052 | PATCH | Trait public method implementation changed
 V053 | PATCH | Trait protected method implementation changed
 V054 | PATCH | Trait private method implementation changed
-V059 | PATCH | Trait private method parameter added
+V059 | MAJOR | Trait private method parameter added
 V064 | PATCH | Trait public method parameter name changed
 V065 | PATCH | Trait protected method parameter name changed
 V066 | PATCH | Trait private method parameter name changed
diff --git a/src/PHPSemVerChecker/Configuration/LevelMapping.php b/src/PHPSemVerChecker/Configuration/LevelMapping.php
index 17a5d58..5bd98ad 100644
--- a/src/PHPSemVerChecker/Configuration/LevelMapping.php
+++ b/src/PHPSemVerChecker/Configuration/LevelMapping.php
@@ -67,7 +67,7 @@ class LevelMapping
 		'V056' => Level::MAJOR,
 		'V057' => Level::MAJOR,
 		'V058' => Level::MAJOR,
-		'V059' => Level::PATCH,
+		'V059' => Level::MAJOR,
 		'V060' => Level::PATCH,
 		'V061' => Level::PATCH,
 		'V062' => Level::PATCH,