diff --git a/requirements_dev.txt b/requirements_dev.txt
index d6ad529..ed22740 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -4,7 +4,7 @@ watchdog==0.8.3
 flake8==3.4.1
 tox==2.9.1
 coverage==4.4.1
-Sphinx==1.6.3
+Sphinx==2.1.1
 PyYAML==3.12
 pytest==3.2.3
 pytest-runner==2.12.1