diff --git a/lib/linux_admin.rb b/lib/linux_admin.rb
index f43d62c..a5401b9 100644
--- a/lib/linux_admin.rb
+++ b/lib/linux_admin.rb
@@ -1,5 +1,5 @@
 require 'more_core_extensions/all'
-require 'active_support/core_ext/string'
+require 'active_support/core_ext'
 
 require 'linux_admin/common'
 require 'linux_admin/rhn'
diff --git a/linux_admin.gemspec b/linux_admin.gemspec
index c2009d5..0e305f9 100644
--- a/linux_admin.gemspec
+++ b/linux_admin.gemspec
@@ -27,7 +27,7 @@ registration, updates, etc.
   spec.add_development_dependency "rspec",    "~> 2.13"
   spec.add_development_dependency "coveralls"
 
-  spec.add_dependency "activesupport"
+  spec.add_dependency "activesupport",        "< 4.0"
   spec.add_dependency "inifile",              "~> 2.0.2"
   spec.add_dependency "more_core_extensions"
   spec.add_dependency "nokogiri"