diff --git a/.profile b/.profile
new file mode 100644
index 00000000..9dfb6ffc
--- /dev/null
+++ b/.profile
@@ -0,0 +1,7 @@
+#!/bin/bash
+
+# This script is only used by Heroku during dyno startup.
+# It ensures setuptools is downgraded early to avoid install issues with legacy packages like django-allauth.
+# Local environments ignore this file.
+
+pip install "setuptools==65.5.1" --no-cache-dir --upgrade