diff --git a/requirements.txt b/requirements.txt
index 66ea9fe..44b5225 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,5 +5,5 @@ watchdog==0.8.3
 flake8==3.5.0
 tox==2.8.2
 coverage==4.4.1
-Sphinx==1.7.9
+Sphinx==8.1.2
 sphinx-rtd-theme==0.1.9