diff --git a/byacc.yaml b/byacc.yaml
index 00bbaf0..b1a79b8 100644
--- a/byacc.yaml
+++ b/byacc.yaml
@@ -2,3 +2,4 @@ version_control: NA
 src_repo: NA
 tag_prefix: NA
 seperator: NA
+url: https://invisible-island.net/byacc/byacc.html