diff --git a/requirements_dev.txt b/requirements_dev.txt
index d3d575c..e88ce3b 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -4,7 +4,7 @@ wheel==0.31.1
 watchdog==0.8.3
 flake8==3.5.0
 tox==3.0.0
-Sphinx==1.7.5
+Sphinx==2.0.0
 coverage==4.5.1
 cryptography==2.2.2
 PyYAML==3.12