diff --git a/app.py b/app.py
index 166f7d6..ab26887 100644
--- a/app.py
+++ b/app.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 from __future__ import annotations
 
 import os
diff --git a/stats.py b/stats.py
index 8235c04..db88e80 100644
--- a/stats.py
+++ b/stats.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 from __future__ import annotations
 
 from collections import defaultdict
diff --git a/storage.py b/storage.py
index 478fe21..b696604 100644
--- a/storage.py
+++ b/storage.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 from __future__ import annotations
 
 import csv