diff --git a/admin/Gemfile b/admin/Gemfile
index 47096903d..f80ab1d01 100644
--- a/admin/Gemfile
+++ b/admin/Gemfile
@@ -41,6 +41,7 @@ gem 'rails3-jquery-autocomplete'
 gem 'activeadmin'
 gem "meta_search", '>= 1.1.0.pre'
 gem 'fog',  "~> 1.3.1"
+gem 'unf' #optional fog dependency
 gem 'country-select'
 gem 'aasm', '3.0.16'
 gem 'postgres-copy'
diff --git a/web/Gemfile b/web/Gemfile
index 4a4ae6449..ab19237e8 100644
--- a/web/Gemfile
+++ b/web/Gemfile
@@ -47,6 +47,7 @@ gem 'aws-sdk', '1.8.0'
 gem 'aasm', '3.0.16'
 gem 'carrierwave'
 gem 'fog'
+gem 'unf' #optional fog dependency
 gem 'devise', '>= 1.1.2'
 #gem 'thin' # the presence of this gem on mac seems to prevent normal startup of rails. 
 gem 'postgres-copy'