diff --git a/pyproject.toml b/pyproject.toml
index 3afe258..066b01c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,7 +8,7 @@ authors = [
 license = "MIT"
 readme = "README.md"
 include = ["README.md", "resources/schemas/*"]
-requires-python = ">=3.11"
+requires-python = ">=3.11, <=3.13"
 dependencies = [
     "linkml-runtime>=1.8.2",
     "linkml>=1.8.2",
@@ -33,4 +33,4 @@ only-include = ["src/wotis/cli.py"]
 root = "src"
 
 [project.scripts]
-wotis = "src.wotis.cli:main"
\ No newline at end of file
+wotis = "src.wotis.cli:main"