diff --git a/pyproject.toml b/pyproject.toml
index 463862e4..2086e3d0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -56,8 +56,8 @@ remote = [
 docs = [
     "ipython==8.26.0",
     "numpydoc==1.7.0",
+    "sphinx_rtd_theme==3.1.0",
     "sphinx==9.0.4",
-    "sphinx_rtd_theme==2.0.0",
     "sphinx_book_theme==1.2.0",
     "sphinx-copybutton==0.5.2",
     "nbsphinx==0.9.4",