diff --git a/requirements_dev.txt b/requirements_dev.txt
index 515784e..536e28b 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -3,7 +3,7 @@ pip==9.0.1
 bumpversion==0.5.3
 wheel==0.30.0
 watchdog==0.8.3
-Sphinx==1.6.4
+Sphinx==2.1.2
 tox==2.9.1
 flake8==3.4.1
 coverage==4.4.1