diff --git a/fontello_rails_converter.gemspec b/fontello_rails_converter.gemspec
index 507adfb..5734169 100644
--- a/fontello_rails_converter.gemspec
+++ b/fontello_rails_converter.gemspec
@@ -18,7 +18,7 @@ Gem::Specification.new do |spec|
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ["lib"]
 
-  spec.required_ruby_version = '~> 2.0'
+  spec.required_ruby_version = '>= 2.0'
 
   spec.add_runtime_dependency "rubyzip", "~> 1.0"
   spec.add_runtime_dependency "launchy"
diff --git a/lib/fontello_rails_converter.rb b/lib/fontello_rails_converter.rb
index 0f73c28..66d0c9c 100644
--- a/lib/fontello_rails_converter.rb
+++ b/lib/fontello_rails_converter.rb
@@ -1,3 +1,4 @@
+require "active_support/isolated_execution_state" if Gem::Requirement.create('>= 7').satisfied_by?(Gem.loaded_specs["activesupport"].version)
 require 'active_support/core_ext/string'
 
 require "fontello_rails_converter/version"
diff --git a/lib/fontello_rails_converter/version.rb b/lib/fontello_rails_converter/version.rb
index f094e64..a77090b 100644
--- a/lib/fontello_rails_converter/version.rb
+++ b/lib/fontello_rails_converter/version.rb
@@ -1,3 +1,3 @@
 module FontelloRailsConverter
-  VERSION = "0.4.6"
+  VERSION = "0.4.7"
 end