diff --git a/CHANGELOG.md b/CHANGELOG.md
index e04c2cc9..19213fe1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,10 @@
 master
 ===
 
+# 4.2.1
+
+* Fix some issues with Ruby 2.4.0
+
 # 4.2.0
 
 Fix #1951. A failed build would "clean" all files in build. Possibly breaking change, "clean" and "after_build" are only run for sucessful builds.
diff --git a/middleman-core/lib/middleman-core/version.rb b/middleman-core/lib/middleman-core/version.rb
index 4fe534de..3338dbda 100644
--- a/middleman-core/lib/middleman-core/version.rb
+++ b/middleman-core/lib/middleman-core/version.rb
@@ -1,5 +1,5 @@
 module Middleman
   # Current Version
   # @return [String]
-  VERSION = '4.2.0'.freeze unless const_defined?(:VERSION)
+  VERSION = '4.2.1'.freeze unless const_defined?(:VERSION)
 end