modules/prefill - document lfs dependency

diff --git a/modules/prefill/README.rst b/modules/prefill/README.rst
index 024dc06d0b8d42dfb9777c860ed9f23afc294502..b9754091a63a36d163feb713b669b18e135fc07d 100644 (file)
--- a/modules/prefill/README.rst
+++ b/modules/prefill/README.rst
@@ -36,6 +36,7 @@ Only root zone import is supported at the moment.
 Dependencies
 ^^^^^^^^^^^^
 
-Depends on the luasec_ library.
+Depends on the luasec_ and luafilesystem_ libraries.
 
 .. _luasec: https://luarocks.org/modules/brunoos/luasec
+.. _luafilesystem: https://keplerproject.github.io/luafilesystem/