diff --git a/web/Gemfile b/web/Gemfile
index 1896803e0..816dbc6c1 100644
--- a/web/Gemfile
+++ b/web/Gemfile
@@ -84,7 +84,7 @@ gem 'slim'
 gem 'htmlentities'
 gem 'sanitize'
 gem 'recurly'
-gem 'guard'
+gem 'guard', '2.7.3'
 
 group :development, :test do
   gem 'rspec-rails', '2.14.2'