diff --git a/requirements_dev.txt b/requirements_dev.txt
index ddd38e0..4ee02a8 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -4,7 +4,7 @@ wheel==0.32.3
 watchdog==0.9.0
 flake8==3.6.0
 tox==3.8.6
-Sphinx==2.1.2
+Sphinx==8.1.3
 coverage==4.5.2
 twine==1.12.1