diff --git a/pyproject.toml b/pyproject.toml
index 50cf657..d2bb373 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -38,7 +38,7 @@ dynamic = ["version"]
 
 [project.optional-dependencies]
 numpy = [
-    "numpy>=1.25.0,<3; python_version>='3.10'",
+    "numpy>=1,<3; python_version>='3.9'",
     "numpy>=1,<3"
 ]
 lint = ["ruff"]