diff --git a/spec/dummy/Gemfile b/spec/dummy/Gemfile
index 089774a..f0f015f 100644
--- a/spec/dummy/Gemfile
+++ b/spec/dummy/Gemfile
@@ -8,7 +8,7 @@ gem 'railties', '~> 4.0.0'
 gem 'sqlite3'
 
 gem 'carrierwave'
-gem 'fog'
+gem 'fog', '>= 1.20.0'
 gem 'kaminari'
 gem 'plupload-rails'