diff --git a/requirements_dev.txt b/requirements_dev.txt
index 558f349..d936cbb 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -5,7 +5,7 @@ watchdog==0.9.0
 flake8==3.7.7
 tox==3.13.2
 coverage==6.0.1
-Sphinx==2.1.2
+Sphinx==8.1.3
 twine==1.13.0
 
 pytest==4.5.0