diff --git a/requirements_dev.txt b/requirements_dev.txt
index f187d50..a1271c7 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==4.4.2
-Sphinx==1.6.5
+Sphinx==8.0.2
 cryptography==2.1.4
 PyYAML==3.12