diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index a68ada5..bbb2756 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,7 +1,7 @@
 $LOAD_PATH.unshift File.expand_path("../../lib", __FILE__)
 require "jekyll"
 require "jekyll-seo-tag"
-require "html/proofer"
+require "html-proofer"
 
 ENV["JEKYLL_LOG_LEVEL"] = "error"