diff --git a/README b/README
index 72ab2f1..2f7ac12 100644
--- a/README
+++ b/README
@@ -12,3 +12,5 @@ Which says there is a tape with 5 cells, second from right being 1 and all
 others being 0, and the tape head is in the middle of this tape
 
 You can also run the compiled result by giving sf2xed.py the -r argument.
+
+All code is under Unlicense / CC0