diff --git a/pyproject.toml b/pyproject.toml
index 69ac969..eea7231 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -53,7 +53,6 @@ dependencies = [
 [project.optional-dependencies]
 doc = [
     "gstools>=1.3,<2",
-    "scipy<1.9",
     "pillow",
     "scikit-learn>=0.19",
     "m2r2>=0.2.8",