diff --git a/VERSION b/VERSION
index be94e6f..b347b11 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-3.2.2
+3.2.3
diff --git a/rack-linkeddata.gemspec b/rack-linkeddata.gemspec
index d575016..c413bc7 100755
--- a/rack-linkeddata.gemspec
+++ b/rack-linkeddata.gemspec
@@ -29,7 +29,7 @@ Gem::Specification.new do |gem|
   gem.requirements               = []
   gem.add_runtime_dependency     'linkeddata', '~> 3.2', '>= 3.2.2'
   gem.add_runtime_dependency     'rack-rdf',   '~> 3.2', '>= 3.2.3'
-  gem.add_runtime_dependency     'rack',       '~> 3.0'
+  gem.add_runtime_dependency     'rack',        '>= 2.2', '< 4'
 
   gem.add_development_dependency 'yard' ,      '~> 0.9'
   gem.add_development_dependency 'rspec',      '~> 3.12'