diff --git a/main.py b/main.py
index b07f4d9..57e279f 100644
--- a/main.py
+++ b/main.py
@@ -1,5 +1,13 @@
 from fastapi import FastAPI
 
+from . import models
+from .database import engine
+
+# This line tells SQLAlchemy to create all the tables based on the models
+# we defined. It will create the `multichat_overlay.db` file with the
+# 'users' and 'settings' tables if they don't exist.
+models.Base.metadata.create_all(bind=engine)
+
 app = FastAPI()
 
 @app.get("/")