diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8d48391..cf9853e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Change log
 
+## [v0.2.2] - unreleased
+
+### Changed
+* Change to relax unicode-display_width version constraint to allow 3.x release
+
 ## [v0.2.1] - 2021-03-09
 
 ### Changed
@@ -65,6 +70,7 @@
 
 * Initial implementation and release
 
+[v0.2.2]: https://github.com/piotrmurach/strings/compare/v0.2.1...v0.2.2
 [v0.2.1]: https://github.com/piotrmurach/strings/compare/v0.2.0...v0.2.1
 [v0.2.0]: https://github.com/piotrmurach/strings/compare/v0.1.8...v0.2.0
 [v0.1.8]: https://github.com/piotrmurach/strings/compare/v0.1.7...v0.1.8
diff --git a/lib/strings/version.rb b/lib/strings/version.rb
index 0b7da20..9d30056 100644
--- a/lib/strings/version.rb
+++ b/lib/strings/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Strings
-  VERSION = "0.2.1"
+  VERSION = "0.2.2"
 end # Strings
diff --git a/strings.gemspec b/strings.gemspec
index 7984135..8578775 100644
--- a/strings.gemspec
+++ b/strings.gemspec
@@ -25,7 +25,7 @@ Gem::Specification.new do |spec|
 
   spec.add_dependency "strings-ansi",          "~> 0.2"
   spec.add_dependency "unicode_utils",         "~> 1.4"
-  spec.add_dependency "unicode-display_width", ">= 1.5", "< 3.0"
+  spec.add_dependency "unicode-display_width", ">= 1.5", "< 4.0"
 
   spec.add_development_dependency "rake"
   spec.add_development_dependency "rspec", ">= 3.0"