diff --git a/patchfile.gemspec b/patchfile.gemspec
index e2d3689..c4328df 100644
--- a/patchfile.gemspec
+++ b/patchfile.gemspec
@@ -1,5 +1,5 @@
 $:.push File.expand_path("../lib", __FILE__)
-
+require 'nokogiri'
 # Maintain your gem's version:
 require "patchfile/version"
 app_path = File.expand_path(__dir__)