diff --git a/debian/copyright b/debian/copyright
index 8deb6c09e5..d2c3ed0972 100644
--- a/debian/copyright
+++ b/debian/copyright
@@ -81,6 +81,12 @@ Files: src/compiler-rt/BlocksRuntime/*
 Copyright: 2008-2010 Apple, Inc.
 License: Expat
 
+Files: src/rt/hoedown/*
+Copyright: 2008 Natacha Porté
+           2011 Vicent Martí
+           2013 Devin Torres and the Hoedown authors
+License: ISC
+
 License: BSD-1-clause
  Redistribution and use in source and binary forms, with
  or without modification, are permitted provided that the
@@ -264,3 +270,16 @@ License: U-OF-I-BSD-LIKE
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE
  SOFTWARE.
+
+License: ISC
+ Permission to use, copy, modify, and distribute this software for any
+ purpose with or without fee is hereby granted, provided that the above
+ copyright notice and this permission notice appear in all copies.
+ .
+ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.