diff --git a/requirements_dev.txt b/requirements_dev.txt
index b146bf2..bdde337 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -5,7 +5,7 @@ watchdog==0.8.3
 flake8==3.3.0
 tox==2.7.0
 coverage==4.4.1
-Sphinx==1.6.3
+Sphinx==8.1.3
 cryptography==2.0.2
 PyYAML==3.12