diff --git a/pyproject.toml b/pyproject.toml
index 4e441a30..f8154d7f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [project]
 name = "palvelutarjotin"
+requires-python = ">= 3.12, <3.13"
 version = "1.31.0"
-requires-python = ">= 3.12"
 
 [tool.ruff]
 target-version = "py312"