diff --git a/pyproject.toml b/pyproject.toml
index cfa7e82e..052871e9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -54,7 +54,7 @@ doc = [
     "pytest-sphinx==0.5.0",
     "pyvista==0.37.0",
     "sphinx-autobuild==2021.3.14",
-    "sphinx-autodoc-typehints==1.20.1",
+    "sphinx-autodoc-typehints==1.21.0",
     "sphinx-copybutton==0.5.1",
     "sphinx-notfound-page==0.8.3",
     "sphinx-gallery==0.11.1",