diff --git a/lib/oauth2.rb b/lib/oauth2.rb
index 46a11a97..db9e94da 100644
--- a/lib/oauth2.rb
+++ b/lib/oauth2.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 # includes modules from stdlib
-require "cgi"
+require "cgi/escape"
 require "time"
 
 # third party gems