diff --git a/CHANGES.md b/CHANGES.md
index fea28b3..623bd8d 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,11 @@
+# 2.0.0
+
+* Added Percentage#to_d
+
+* Percentage instances are now frozen on initialization
+
+* Changed `Percentage.change` to return `nil` when first argument is zero
+
 # 1.4.1
 
 * Added CHANGES.md to gem files
diff --git a/percentage.gemspec b/percentage.gemspec
index aaf67f4..e3808ba 100644
--- a/percentage.gemspec
+++ b/percentage.gemspec
@@ -1,6 +1,6 @@
 Gem::Specification.new do |s|
   s.name = 'percentage'
-  s.version = '1.4.1'
+  s.version = '2.0.0'
   s.license = 'LGPL-3.0'
   s.platform = Gem::Platform::RUBY
   s.authors = ['Tim Craft']