diff --git a/setup.py b/setup.py
index 9f0728c9480dd81dc23f0031f9036c1d638e67b2..5a8c572b632ffa7304c4eadd181668b1f55e013c 100755
--- a/setup.py
+++ b/setup.py
@@ -48,6 +48,7 @@ setup(
     description="Software Heritage Web UI",
     long_description=long_description,
     long_description_content_type="text/markdown",
+    python_requires=">=3.7",
     author="Software Heritage developers",
     author_email="swh-devel@inria.fr",
     url="https://forge.softwareheritage.org/diffusion/DWUI/",