diff --git a/requirements/development.txt b/requirements/development.txt
index cdecd688..2275f2a4 100644
--- a/requirements/development.txt
+++ b/requirements/development.txt
@@ -18,4 +18,4 @@ mock==2.0.0
 hypothesis==3.32.0
 
 # docs
-Sphinx==1.6.4
+Sphinx==2.3.0