diff --git a/docs/index.rst b/docs/index.rst
index 3e6d3cd4e..ec517c707 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -231,6 +231,7 @@ Xonsh currently has the following external dependencies,
     #. Python v3.4+
     #. PLY
     #. prompt-toolkit (optional)
+    #. Jupyter (optional)
 
 *Documentation:*