diff --git a/activeadmin.gemspec b/activeadmin.gemspec
index 6f6272a179d..6a824ac3e76 100644
--- a/activeadmin.gemspec
+++ b/activeadmin.gemspec
@@ -22,7 +22,7 @@ Gem::Specification.new do |s|
   s.add_dependency("bourbon", ">= 1.0.0")
   s.add_dependency("meta_search", ">= 0.9.2")
   s.add_dependency("devise", ">= 1.1.2")
-  s.add_dependency("formtastic", "~> 2.1.1")
+  s.add_dependency("formtastic", "~> 2.2.0")
   s.add_dependency("inherited_resources", ">= 1.3.1")
   s.add_dependency("kaminari", ">= 0.13.0")
   s.add_dependency("sass", ">= 3.1.0")