diff --git a/docs/requirements.txt b/docs/requirements.txt
index 20581bd..054de08 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -5,3 +5,5 @@ sphinx-tabs==1.1.11
 sphinxcontrib-spelling==4.2.1
 imagesize==0.7.1
 Pillow==4.3.0
+recommonmark==0.6.0
+sphinx-markdown-tables==0.0.9