diff --git a/Gemfile b/Gemfile
index 8266cb8..dc0e671 100644
--- a/Gemfile
+++ b/Gemfile
@@ -13,7 +13,7 @@ group :development do
 end
 
 group :test do
-  gem 'html-proofer', '2.5.2'
+  gem 'html-proofer', '~> 2.6'
   gem 'rake'
   gem 'rspec'
   gem 'nokogiri'