diff --git a/README.rst b/README.rst
index 6e403e8307a5a060164155dbf63aff4eab41f50b..38003a9f0d737f21d0c19111b6ac8947d283606e 100644
--- a/README.rst
+++ b/README.rst
@@ -42,6 +42,7 @@ Installation
 
    pip install klaus
 
+(Optional dependencies: see `Markup rendering <https://github.com/jonashaag/klaus/wiki/Markup-rendering>`_ in the wiki.)
 
 Usage
 -----