diff --git a/Procfile b/Procfile
new file mode 100644
index 00000000..4bcf3206
--- /dev/null
+++ b/Procfile
@@ -0,0 +1,2 @@
+web: python -m gunicorn -k uvicorn.workers.UvicornWorker -c pr_agent/servers/gunicorn_config.py --forwarded-allow-ips "*" pr_agent.servers.github_app:app
+
diff --git a/pr_agent/servers/gunicorn_config.py b/pr_agent/servers/gunicorn_config.py
index 1b4034bf..c4b0d335 100644
--- a/pr_agent/servers/gunicorn_config.py
+++ b/pr_agent/servers/gunicorn_config.py
@@ -24,7 +24,9 @@ import os
 #
 
 # bind = '0.0.0.0:5000'
-bind = '0.0.0.0:3000'
+# Use Heroku's PORT env var if available, otherwise default to 3000
+port = int(os.getenv('PORT', '3000'))
+bind = f'0.0.0.0:{port}'
 backlog = 2048
 
 #
diff --git a/runtime.txt b/runtime.txt
new file mode 100644
index 00000000..51a25b56
--- /dev/null
+++ b/runtime.txt
@@ -0,0 +1,2 @@
+python-3.12.10
+