diff --git a/pyproject.toml b/pyproject.toml
index 29840cb..d9012f4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -53,7 +53,7 @@ testing = [
 
 
 documentation = [
-    "numpydoc ==1.6.0",
+    "numpydoc ==1.9.0",
     "sphinx >=5.1.1",
     "sphinx-gallery ==0.15.0",
     "sphinx-rtd-theme ==2.0.0",