diff --git a/README.md b/README.md
index cb859007a6d46a2e6ddd704bd29a2c5fce3e3f13..73a3c7a7972ad0a1665980434bd062b77d3b95b1 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,12 @@ UNL Resource Scheduler
 
 UNL Resource Scheduler is a web app developed around managing timed reservations for various campus resources. This app was initially created for the Nebraska Innovation Studio, and then expanded and generalized to be able to be used by all departments at UNL. New features are in development and feature and bugfix requests will usually be attended to quickly.
 
+Patch
+============
+Supporting UNL's October 2018 move to shib.unl.edu/idp/profile/cas requires CAS tickets longer than 256 chars. Manually patch the rack-cas library to support tickets up to 1024.
+ - https://github.com/biola/rack-cas/blob/master/lib/rack-cas/cas_request.rb#L35
+ - vendor/bundle/ruby/2.2.0/gems/rack-cas-0.16.0/lib/rack-cas/cas_request.rb
+
 Installation
 ============