diff --git a/README.md b/README.md
index e24ee2fde..cbc05b8c1 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,8 @@ Play the Ludum Dare prototype here: https://ninja-muffin24.itch.io/friday-night-
 Play the Newgrounds one here: https://www.newgrounds.com/portal/view/770371
 Support the project on the itch.io page: https://ninja-muffin24.itch.io/funkin
 
+IF YOU MAKE A MOD AND DISTRIBUTE THE .EXE, YOU MUST OPEN SOURCE YOUR MOD AS WELL
+
 ## Credits / shoutouts
 
 - [ninjamuffin99 (me!)](https://twitter.com/ninja_muffin99) - Programmer