diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5b97821..7d18bef 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changelog
 
-## HEAD
+## 1.0.0
 
 :warning: This version drops support for Ruby 1.9.
 
diff --git a/lib/memfs/version.rb b/lib/memfs/version.rb
index 8db26cb..c705745 100644
--- a/lib/memfs/version.rb
+++ b/lib/memfs/version.rb
@@ -1,3 +1,3 @@
 module MemFs
-  VERSION = '0.5.0'.freeze
+  VERSION = '1.0.0'.freeze
 end