diff --git a/requirements_dev.txt b/requirements_dev.txt
index 1635ba8..06be7be 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -5,7 +5,7 @@ watchdog==0.8.3
 flake8==3.5.0
 tox==2.9.1
 coverage==4.5.1
-Sphinx==1.6.7
+Sphinx==2.2.0
 twine==1.9.1
 cryptography==2.1.4
 PyYAML==3.12