diff --git a/Gemfile b/Gemfile
index 3784e60d..9dae2827 100644
--- a/Gemfile
+++ b/Gemfile
@@ -14,7 +14,7 @@ gem "i18n", "~> 0.6.0"
 gem "coderay", "~> 1.0.6"
 gem "fastercsv", "~> 1.5.0", :platforms => [:mri_18, :mingw_18, :jruby]
 gem "builder", "3.0.0"
-gem 'acts-as-taggable-on'
+gem 'acts-as-taggable-on', '2.4.1'
 
 group :development do
   gem 'better_errors', path: 'lib/better_errors'