diff --git a/README.md b/README.md
index f36bceb..bcb98e8 100644
--- a/README.md
+++ b/README.md
@@ -29,6 +29,8 @@ Cthulhu has the following dependencies:
 * liblouis         - Liblouis (<http://liblouis.org/>) support for contracted braille (optional)
 * py-setproctitle  - Python library to set the process title (optional)
 * gstreamer-1.0    - GStreamer - Streaming media framework (optional)
+* socat            - Used for self-voicing functionality.
+* libpeas          - For the plugin system.
 
 You are strongly encouraged to also have the latest stable versions
 of AT-SPI2 and ATK.