diff --git a/pitfall/LICENSE.md b/pitfall/LICENSE.md
index 0930e9b5..6f0e85ab 100644
--- a/pitfall/LICENSE.md
+++ b/pitfall/LICENSE.md
@@ -1,6 +1,6 @@
 MIT License
 
-Pitfall is © 2017–2018 Matthew Butterick
+Pitfall (code only) is © 2017–2019 Matthew Butterick
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal