diff --git a/requirements_dev.txt b/requirements_dev.txt
index 94dd2cc..bfb156e 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -6,6 +6,6 @@ watchdog==0.9.0
 pytest==5.1.2
 coverage==4.5.4
 tox==3.13.2
-Sphinx==2.2.0
+Sphinx==8.1.3
 twine==1.13.0
 pytest-runner==5.1