diff --git a/requirements_dev.txt b/requirements_dev.txt
index a3796ee..1a0c8dc 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -6,7 +6,7 @@ flake8==3.6.0
 tox==3.5.3
 coverage==4.5.2
 pytest-aiohttp==0.3.0
-Sphinx==1.8.2
+Sphinx==2.1.0
 cryptography==2.4.1
 PyYAML==4.2b4
 pytest==4.0.0