diff --git a/pyproject.toml b/pyproject.toml
index dbbef07963a4c08efe91043cc9a144357d96fbf4..c157ff3b3d4f518ff6a8b0aefb97e12de6557a20 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -32,6 +32,7 @@ keywords = [
 license = {file = "LICENSE.txt"}
 name = "sampleproject"
 readme = "README.rst"
+requires-python = ">=3.7"
 
 [project.scripts]
 sampleproject = "sampleproject:main"