diff --git a/Makefile b/Makefile
index 2aca763..af0e2bf 100644
--- a/Makefile
+++ b/Makefile
@@ -55,6 +55,9 @@
 	python3 -m venv $(VENV)
 	$(PIP) install -r requirements.txt
 
+freeze:
+	pip3 freeze | grep -v "pkg-resources" > requirements.txt
+
 docker-build: $(VENV)
 	docker build $(DOCKER_BUILD_ARGS) \
 		-t $(DOCKER_IMAGENAME) \
diff --git a/person_detection/app.py b/person_detection/app.py
index 1cd5bb5..443fbde 100644
--- a/person_detection/app.py
+++ b/person_detection/app.py
@@ -1,4 +1,8 @@
 #!/usr/bin/env python
+"""
+SPDX-FileCopyrightText: 2020-present Open Networking Foundation <info@opennetworking.org>
+SPDX-License-Identifier: LicenseRef-ONF-Member-1.01
+"""
 from importlib import import_module
 import os
 from flask import Flask, render_template, Response
diff --git a/requirements.txt b/requirements.txt
index e07847b..c91b2ad 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,8 +1,12 @@
 click==8.0.1
+dataclasses==0.8
 Flask==2.0.1
+importlib-metadata==4.8.1
 imutils==0.5.4
 itsdangerous==2.0.1
 Jinja2==3.0.1
 MarkupSafe==2.0.1
 numpy==1.19.5
+typing-extensions==3.10.0.2
 Werkzeug==2.0.1
+zipp==3.6.0