diff --git a/rb/lib/selenium/webdriver.rb b/rb/lib/selenium/webdriver.rb
index c78a67620d858..479d9e1daf52c 100644
--- a/rb/lib/selenium/webdriver.rb
+++ b/rb/lib/selenium/webdriver.rb
@@ -23,6 +23,7 @@
 require 'date'
 require 'json'
 require 'set'
+require 'uri'
 
 require 'selenium/webdriver/atoms'
 require 'selenium/webdriver/common'