Index: README.md
==================================================================
--- README.md
+++ README.md
@@ -19,10 +19,11 @@
 
 ## Availability
 
 - [GitHub](https://github.com/reduce-algebra/mtt)
 - [SourceHut](https://git.sr.ht/~trn/mtt)
+- [NotABug](https://notabug.org/reduce-algebra/mtt/)
 - [Chisel](https://chiselapp.com/user/reduce-algebra/repository/mtt)
 - [Sourceforge](http://mtt.sf.net) *(Archived)*
   - [MTT Developers Mailing List Archive](https://sourceforge.net/p/mtt/mailman/mtt-developers/?limit=250&style=threaded)
   - [MTT Help Mailing List Archive](https://sourceforge.net/p/mtt/mailman/mtt-help/?limit=250&style=threaded)