diff --git a/requirements_dev.txt b/requirements_dev.txt
index 0f31a07..c801592 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -10,7 +10,7 @@ pytest==6.2.4
 pytest-cov==2.12.1
 pytest-runner==5.3.1
 pytest-vcr==1.0.2
-Sphinx==4.1.0
+Sphinx==8.1.3
 sphinx-autobuild==2021.3.14
 sphinx_gallery==0.9.0
 tox==3.23.1