diff --git a/README.md b/README.md
index 584f6ff..c289de8 100644
--- a/README.md
+++ b/README.md
@@ -13,6 +13,7 @@ glitch art "framework", ???????? language??? something?
  - zig at https://ziglang.org
  - libc, lilv and libsndfile
  - graphicsmagick for the `rotate` command
+ - readline (for repl)
 
 ## plugin depedencies (only required at runtime):
  - lv2 default plugins (most specifically the eg-amp plugin,