diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7257989..76c3358 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## master (unreleased)
 
+## 1.0.0 (2019-03-14)
+
 ### New features
 
 * Extract performance cops from rubocop-hq/rubocop repository. ([@composerinteralia][], [@koic][])
diff --git a/lib/rubocop/performance/version.rb b/lib/rubocop/performance/version.rb
index 5852870..82629a5 100644
--- a/lib/rubocop/performance/version.rb
+++ b/lib/rubocop/performance/version.rb
@@ -3,7 +3,7 @@
 module RuboCop
   module Performance
     module Version
-      STRING = '0.0.1'.freeze
+      STRING = '1.0.0'.freeze
     end
   end
 end