diff --git a/README.md b/README.md
index c1e40c59..f0d0b6ac 100644
--- a/README.md
+++ b/README.md
@@ -343,6 +343,8 @@ The modules that ship with Scryer Prolog are also called
   for measuring the performance of your code.
 * [`cont`](src/prolog/lib/cont.pl)
   Provides *delimited continuations* via `reset/3` and `shift/1`.
+* [`random`](src/prolog/lib/random.pl)
+  Probabilistic predicates and random number generators.
 
 To read contents of external files, use `phrase_from_file/2` from
 [`library(pio)`](src/prolog/lib/pio.pl) to apply a DCG to