diff --git a/app/mailman-web/LICENSE b/app/mailman-web/LICENSE
new file mode 100644
index 0000000..4e2fa46
--- /dev/null
+++ b/app/mailman-web/LICENSE
@@ -0,0 +1,3 @@
+Mailman and its components (postorius, hyperkitty) are licensed under GPLv3 and we link/import that code here directly.
+Also, a good portion of this wsgi launcher is copied from https://gitlab.com/mailman/mailman-web, GPLv3 as well.
+Therefore, this entire directory likely falls under GPLv3.