diff --git a/requirements-docs.txt b/requirements-docs.txt
index 74ca237..a0f7c88 100644
--- a/requirements-docs.txt
+++ b/requirements-docs.txt
@@ -11,6 +11,6 @@
 # setup.py.
 ipython ~=7.34.0
 numpydoc ~=1.7
-sphinx ~=8.1.3
+sphinx ~=8.2.1
 sphinx-copybutton ~=0.5.2
 sphinx_rtd_theme ~=3.0.2