diff --git a/pyproject.toml b/pyproject.toml
index 8e6a8aa0b..04421a919 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -85,7 +85,7 @@ testing = [
 documentation = [
     "numpydoc ==1.10.0",
     "sphinx >=5.1.1",
-    "sphinx-rtd-theme ==3.0.2",
+    "sphinx-rtd-theme ==3.1.0",
     "sphinx-gallery ==0.20.0",
     "pydata-sphinx-theme ==0.15.4",
 ]