diff --git a/.ruby-version b/.ruby-version
index 77fee73..b1b25a5 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-1.9.3
+2.2.2
diff --git a/tackle_box.gemspec b/tackle_box.gemspec
index 2c48b5c..729a700 100644
--- a/tackle_box.gemspec
+++ b/tackle_box.gemspec
@@ -17,7 +17,7 @@ Gem::Specification.new do |gem|
   gem.test_files    = gem.files.grep(%r{^(test|spec|features)/})
   gem.require_paths = ['lib']
 
-  gem.add_dependency 'activesupport',  '~> 3.2'
+  gem.add_dependency 'activesupport',  '~> 5.1'
   gem.add_dependency 'shorturl',       '~> 1.0'
   gem.add_dependency 'liquid',         '~> 2.4'
   gem.add_dependency 'nokogiri',       '~> 1.6'