diff --git a/README.md b/README.md
index 81dbe3fb..7a989fca 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,10 @@ so that I can experiment with keyboards and layouts without the overhead of the
   avoid ghosting. This has a sparse 13x13 scanning matrix (using 26 GPIO pins)
   for 36 keys with 6-key rollover.
 
+* [Slump52](keyboards/slump52/readme.md), a Graph Theory based diode-free keyboard with
+  26 GPIO pins for 52 keys in a sparse 13x13 scanning matrix with only 4-key roll-over
+  using the Incidence Graph of the Projective Plane of order 3, PG(2,3).
+
 You can [download pre-compiled firmware](https://github.com/peterjc/qmk_userspace/releases).
 An 'offical' release is recommended, the 'latest' binaries may contain experimental changes.
 The versions with Vial support are strongly recommended as you can the use the