diff --git a/Pipfile b/Pipfile
index a19662d..a3bba7c 100644
--- a/Pipfile
+++ b/Pipfile
@@ -13,6 +13,7 @@ pytz = "*"
 faker = "*"
 humanize = "*"
 gunicorn = "*"
+psycopg2 = "*"
 
 [dev-packages]
 
diff --git a/Pipfile.lock b/Pipfile.lock
index 3c48218..ff4a891 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "dd2fc4ce524f938712d6eeef0a31be717e8b640fc33fd94260973f34c773e260"
+            "sha256": "e51737b38157b4d1e2b57226a5a07dbce7558baeef5895e41cede4d2809de74b"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -211,6 +211,23 @@
             "markers": "python_version >= '3.7'",
             "version": "==2.1.1"
         },
+        "psycopg2": {
+            "hashes": [
+                "sha256:06f32425949bd5fe8f625c49f17ebb9784e1e4fe928b7cce72edc36fb68e4c0c",
+                "sha256:0762c27d018edbcb2d34d51596e4346c983bd27c330218c56c4dc25ef7e819bf",
+                "sha256:083707a696e5e1c330af2508d8fab36f9700b26621ccbcb538abe22e15485362",
+                "sha256:34b33e0162cfcaad151f249c2649fd1030010c16f4bbc40a604c1cb77173dcf7",
+                "sha256:4295093a6ae3434d33ec6baab4ca5512a5082cc43c0505293087b8a46d108461",
+                "sha256:8cf3878353cc04b053822896bc4922b194792df9df2f1ad8da01fb3043602126",
+                "sha256:8e841d1bf3434da985cc5ef13e6f75c8981ced601fd70cc6bf33351b91562981",
+                "sha256:9572e08b50aed176ef6d66f15a21d823bb6f6d23152d35e8451d7d2d18fdac56",
+                "sha256:a81e3866f99382dfe8c15a151f1ca5fde5815fde879348fe5a9884a7c092a305",
+                "sha256:cb10d44e6694d763fa1078a26f7f6137d69f555a78ec85dc2ef716c37447e4b2",
+                "sha256:d3ca6421b942f60c008f81a3541e8faf6865a28d5a9b48544b0ee4f40cac7fca"
+            ],
+            "index": "pypi",
+            "version": "==2.9.3"
+        },
         "python-dateutil": {
             "hashes": [
                 "sha256:0123cacc1627ae19ddf3c27a5de5bd67ee4586fbdd6440d9748f8abb483d3e86",
diff --git a/app.py b/app.py
index ac70f35..00c569a 100644
--- a/app.py
+++ b/app.py
@@ -8,7 +8,6 @@ from faker import Faker
 from flask import Flask, render_template, request
 from flask_login import LoginManager, current_user
 from flask_sqlalchemy import SQLAlchemy
-# init SQLAlchemy
 from werkzeug.security import generate_password_hash
 
 db = SQLAlchemy()
@@ -23,6 +22,7 @@ def create_app():
         app.config['SECRET_KEY'] = 'secret key goes here'
         app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///db.sqlite'
 
+    # Heroku deployment
     if app.config['ENV'] == 'production':
         app.config['SECRET_KEY'] = os.getenv('SECRET_KEY')
         app.config['SQLALCHEMY_DATABASE_URI'] = os.getenv('DATABASE_URL').replace('postgres://', 'postgresql://', 1)