diff --git a/actionpack/lib/action_view/helpers/tag_helper.rb b/actionpack/lib/action_view/helpers/tag_helper.rb
index 8c7524e..1968c52 100644
--- a/actionpack/lib/action_view/helpers/tag_helper.rb
+++ b/actionpack/lib/action_view/helpers/tag_helper.rb
@@ -166,7 +166,7 @@ module ActionView
         def tag_option(key, value, escape)
           value = value.join(" ") if value.is_a?(Array)
           value = ERB::Util.h(value) if escape
-          %(#{key}="#{value}")
+          %(#{key}="#{value.gsub(/"/, '"'.freeze)}")
         end
     end
   end
-- 
2.5.5