diff --git a/active_interaction.gemspec b/active_interaction.gemspec
index 77768be9..68aaae6a 100644
--- a/active_interaction.gemspec
+++ b/active_interaction.gemspec
@@ -35,6 +35,7 @@ Gem::Specification.new do |gem| # rubocop:disable Metrics/BlockLength
   gem.test_files = Dir.glob(File.join('spec', '**', '*.rb'))
 
   gem.add_dependency 'activemodel', '>= 5', '< 7'
+  gem.add_dependency 'activesupport', '>= 5', '< 7'
 
   {
     'actionpack' => [],
diff --git a/lib/active_interaction.rb b/lib/active_interaction.rb
index 42c0344c..df9fcc3c 100644
--- a/lib/active_interaction.rb
+++ b/lib/active_interaction.rb
@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
 require 'active_model'
+require 'active_support/core_ext/hash/indifferent_access'
 
 # Manage application specific business logic.
 #