diff --git a/requirements_dev.txt b/requirements_dev.txt
index f03b5e9..42a9c4f 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -4,7 +4,7 @@ watchdog==0.8.3
 flake8==3.5.0
 tox==2.9.1
 coverage==4.5.1
-Sphinx==1.7.2
+Sphinx==2.1.2
 PyYAML==3.12
 pytest==3.5.0
 pytest-cov==2.5.1