diff --git a/docs/requirements.txt b/docs/requirements.txt
index 3f476075..70c09fb1 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -125,7 +125,7 @@ six==1.17.0
     # via python-dateutil
 snowballstemmer==3.0.1
     # via sphinx
-sphinx==8.2.3
+sphinx==9.0.4
     # via
     #   numpydoc
     #   solarwindpy (pyproject.toml)
@@ -133,7 +133,7 @@ sphinx==8.2.3
     #   sphinxcontrib-bibtex
     #   sphinxcontrib-jquery
     #   sphinxcontrib-spelling
-sphinx-rtd-theme==3.0.2
+sphinx-rtd-theme==3.1.0
     # via solarwindpy (pyproject.toml)
 sphinxcontrib-applehelp==2.0.0
     # via sphinx