diff --git a/pyproject.toml b/pyproject.toml
index 3fdb21a1..d0a2d4ef 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -110,7 +110,7 @@ authors = [
 ]
 readme = "cli/README.md"
 license = "MIT"
-requires-python = ">=3.13.5"
+requires-python = ">=3.13.5,<4.0"
 dependencies = [
     "click==8.3.1",
     "httpx==0.28.1",