diff --git a/pyproject.toml b/pyproject.toml
index 7175982..53e0a56 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,6 +33,7 @@ dependencies = [
     "jsonschema>=2.5.1",
     "xmltodict>=0.11.0",
 ]
+requires-python = ">=3.8"
 
 [project.urls]
 Homepage = "https://github.com/h2non/pook"