diff --git a/pyproject.toml b/pyproject.toml
index 46deffa..ff237c8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,7 +3,7 @@ name = "nanochat"
 version = "0.1.0"
 description = "the minimal full-stack ChatGPT clone"
 readme = "README.md"
-requires-python = ">=3.10"
+requires-python = ">=3.9"
 dependencies = [
     "datasets>=4.0.0",
     "fastapi>=0.117.1",