diff --git a/requirements_dev.txt b/requirements_dev.txt
index a4c8216..bd6a597 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -5,7 +5,7 @@ watchdog==0.8.3
 flake8==3.4.1
 tox==2.8.0
 coverage==4.4.1
-Sphinx==1.6.3
+Sphinx==8.1.2
 cryptography==2.0.3
 PyYAML==3.12
 pytest==3.2.1