diff --git a/requirements/requirements-doc.txt b/requirements/requirements-doc.txt
index ed9c0636..549087ee 100644
--- a/requirements/requirements-doc.txt
+++ b/requirements/requirements-doc.txt
@@ -2,4 +2,6 @@ mkdocs>=1.0
 markdown-include
 pydoc-markdown
 https://github.com/databio/mkdocs-databio/archive/master.zip
+ngstk
+ubiquerg
 peppy