diff --git a/README.md b/README.md
index 823aa66..c9500cc 100644
--- a/README.md
+++ b/README.md
@@ -151,7 +151,7 @@ WorkingDirectory=/srv/fasthue
 Environment=FASTHUE_SECRETS_FILE=/etc/fasthue/secrets.yaml
 RuntimeDirectory=fasthue
 RuntimeDirectoryMode=0750
-ExecStart=/srv/fasthue/.venv/bin/gunicorn --workers 1 --umask 007 --bind unix:/run/fasthue/fasthue.sock --factory app:create_gunicorn_app
+ExecStart=/srv/fasthue/.venv/bin/gunicorn --workers 1 --umask 007 --bind unix:/run/fasthue/fasthue.sock app:gunicorn_app
 Restart=on-failure
 RestartSec=3
 
diff --git a/app.py b/app.py
index 936f397..eefbc69 100644
--- a/app.py
+++ b/app.py
@@ -234,6 +234,12 @@ def create_gunicorn_app() -> Flask:
     return create_app(config_path, verify_tls, api_key, configured_url_prefix())
 
 
+# Older Gunicorn releases do not support --factory.  Expose a WSGI callable at
+# import time so they can load this application with `app:gunicorn_app`.
+if __name__ != "__main__":
+    gunicorn_app = create_gunicorn_app()
+
+
 def main() -> None:
     parser = argparse.ArgumentParser(description=__doc__)
     parser.add_argument("--config", type=Path, default=ROOT / "hue.yaml", help="Dashboard YAML file")