diff --git a/requirements_dev.txt b/requirements_dev.txt
index 6f904af..116738d 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -5,7 +5,7 @@ watchdog==0.8.3
 flake8==3.5.0
 tox==3.1.1
 coverage==4.5.1
-Sphinx==1.7.5
+Sphinx==2.0.0
 cryptography==2.2.2
 PyYAML==3.13
 pytest==3.6.3