diff --git a/dev-requirements.txt b/dev-requirements.txt
index 2d321db7..f2c4aab9 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -1,6 +1,7 @@
 pytest
 jupyter
 notebook
+recommonmark
 sphinx
 sphinx-autodoc-typehints
 sphinx_rtd_theme