diff --git a/protocol/README.rst b/protocol/README.rst
index 6b8d5a8..33b8db2 100644
--- a/protocol/README.rst
+++ b/protocol/README.rst
@@ -2,8 +2,8 @@
  Zcash Protocol Specification
 ==============================
 
-Build dependencies on debian include, at least:
+Build dependencies on Debian-based systems include, at least:
 
 .. code::
 
-   apt-get install texlive texlive-science texlive-fonts-extra texlive-generic-recommended
+   apt-get install texlive texlive-science texlive-fonts-extra texlive-generic-recommended biber