diff --git a/pyproject.toml b/pyproject.toml
index e1df715..24dd1f6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [project]
 name = "drizzle"
 description = "A package for combining dithered images into a single image"
-requires-python = ">=3.10"
+requires-python = ">=3.10,<3.13"
 authors = [
     { name = "STScI", email = "help@stsci.edu" },
 ]