diff --git a/bids-validator/pyproject.toml b/bids-validator/pyproject.toml
index dfc6b0aea..0dbec0bf2 100644
--- a/bids-validator/pyproject.toml
+++ b/bids-validator/pyproject.toml
@@ -20,6 +20,7 @@ classifiers = [
     "Programming Language :: Python",
     "Topic :: Scientific/Engineering",
 ]
+requires-python = ">=3.8"
 
 [project.urls]
 Homepage = "https://github.com/bids-standard/bids-validator"