diff --git a/pyproject.toml b/pyproject.toml
index 85b186d4..66de09c0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,9 +21,10 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
     "Operating System :: OS Independent",
 ]
-requires-python = ">= 3.9, < 3.13"
+requires-python = ">= 3.9"
 dependencies = [
     "numpy >= 1.20",
     "pint >= 0.24.1",