diff --git a/pyproject.toml b/pyproject.toml
index f2ba107b..1c85e162 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -66,7 +66,7 @@ dev = [
   "mypy==v1.13.0 ; python_version>='3.8'",
   # Docs.
   "Sphinx==7.3.7 ; python_version>='3.9'",
-  "sphinx-rtd-theme==2.0.0 ; python_version>='3.9'",
+  "sphinx-rtd-theme==3.0.2 ; python_version>='3.9'",
 ]
 
 [project.urls]