diff --git a/pyproject.toml b/pyproject.toml
index a037246..9c568ea 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,7 +35,7 @@ classifiers = [
   "Programming Language :: Python :: 3.12",
 ]
 dependencies = [
-    "numpy>=2.0.2",
+    "numpy>=1.21,<3",
 ]
 
 [project.urls]