diff --git a/Formula/byacc.rb b/Formula/byacc.rb
index a4f83fc042..f711a50326 100644
--- a/Formula/byacc.rb
+++ b/Formula/byacc.rb
@@ -1,8 +1,8 @@
 class Byacc < Formula
   desc "(Arguably) the best yacc variant"
   homepage "https://invisible-island.net/byacc/"
-  url "https://invisible-mirror.net/archives/byacc/byacc-20180525.tgz"
-  sha256 "129b8d8be35c2cecb89e4ef434dc512402c0243f485334c5733ddf1e267c2de6"
+  url "https://invisible-mirror.net/archives/byacc/byacc-20180609.tgz"
+  sha256 "5bbb0b3ec3da5981a2488383b652499d6c1e0236b47d8bac5fcdfa12954f749c"
 
   bottle do
     cellar :any_skip_relocation