diff --git a/REQUIREMENTS.txt b/REQUIREMENTS.txt
index 8a4a059..b5612ae 100644
--- a/REQUIREMENTS.txt
+++ b/REQUIREMENTS.txt
@@ -6,3 +6,5 @@ Markdown==2.6.9
 Pygments==2.2.0
 pytz==2017.2
 PyYAML==3.12
+Sphinx==1.7.5
+ipython==5.7.0