diff --git a/activerecord/activerecord.gemspec b/activerecord/activerecord.gemspec
index a28109897b..c87f34713c 100644
--- a/activerecord/activerecord.gemspec
+++ b/activerecord/activerecord.gemspec
@@ -21,6 +21,6 @@ Gem::Specification.new do |s|
 
   s.add_dependency('activesupport', version)
   s.add_dependency('activemodel',   version)
-  s.add_dependency('arel',          '~> 2.1.5')
+  s.add_dependency('arel',          '~> 2.2.0')
   s.add_dependency('tzinfo',        '~> 0.3.29')
 end