diff --git a/requirements.txt b/requirements.txt
index 6411bf6..916d750 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,4 +10,7 @@ flask-sqlalchemy
 flask-cors
 requests
 psycopg2-binary
-email_validator
\ No newline at end of file
+email_validator
+minio
+flask-minio
+bleach
\ No newline at end of file
diff --git a/src/app.py b/src/app.py
index 31ff5c5..b85857e 100644
--- a/src/app.py
+++ b/src/app.py
@@ -7,11 +7,12 @@ from sentry_sdk.integrations.sqlalchemy import SqlalchemyIntegration
 from healthcheck import HealthCheck
 from flask_cors import CORS
 
-from utils.config import SENTRY_DSN, RELEASE_ID, RELEASEMODE, POSTGRES_DB, PORT, POSTGRES_HOSTNAME, POSTGRES_PASSWORD, \
-    POSTGRES_USERNAME, DEBUG, SECRET_KEY, ALLOWED_ORIGINS
-from utils import db, health_database_status, security, user_datastore
+from utils.config import SENTRY_DSN, RELEASE_ID, RELEASEMODE, PORT, DEBUG, SECRET_KEY, ALLOWED_ORIGINS, SQLALCHEMY_URI
+from utils import health_database_status, security, user_datastore
 from views import ItemView, ProfileView, UploadView, IndexView
 
+from models import db
+
 """
 Main Flask entrypoint
 """
@@ -33,8 +34,7 @@ if SENTRY_DSN:
     )
 
 app = Flask(__name__)
-app.config['SQLALCHEMY_DATABASE_URI'] = \
-    f"postgresql://{POSTGRES_USERNAME}:{POSTGRES_PASSWORD}@{POSTGRES_HOSTNAME}:5432/{POSTGRES_DB}"
+app.config['SQLALCHEMY_DATABASE_URI'] = SQLALCHEMY_URI
 app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
 app.config['SECRET_KEY'] = SECRET_KEY
 app.config['SECURITY_REGISTERABLE'] = True
diff --git a/src/models/__init__.py b/src/models/__init__.py
index ce899fd..1e6d09c 100644
--- a/src/models/__init__.py
+++ b/src/models/__init__.py
@@ -1,3 +1,4 @@
+from .db import db
 from .user import User
 from .role import Role
 from .item import Item
diff --git a/src/models/comment.py b/src/models/comment.py
new file mode 100644
index 0000000..9a6a640
--- /dev/null
+++ b/src/models/comment.py
@@ -0,0 +1,17 @@
+#!/usr/bin/env python3
+from sqlalchemy import func
+
+from . import db
+
+
+class Comment(db.Model):
+    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
+    timestamp = db.Column(db.TIMESTAMP, nullable=False, server_default=func.now())
+
+    commenter_id = db.Column(db.Integer, db.ForeignKey("user.id", ondelete="CASCADE"), nullable=False)
+    commenter = db.relationship("User", backref=db.backref("comments", lazy=True))
+
+    item_id = db.Column(db.Integer, db.ForeignKey("item.id", ondelete="CASCADE"), nullable=False)
+    item = db.relationship("Item", backref=db.backref("comments", lazy=True))
+
+    text = db.Text(4096, nullable=False)
diff --git a/src/utils/db.py b/src/models/db.py
similarity index 100%
rename from src/utils/db.py
rename to src/models/db.py
diff --git a/src/models/item.py b/src/models/item.py
index dc8135f..b0a2612 100644
--- a/src/models/item.py
+++ b/src/models/item.py
@@ -1,7 +1,7 @@
 #!/usr/bin/env python3
 from sqlalchemy import func
 
-from utils import db
+from . import db
 
 """
 Item model
@@ -16,4 +16,7 @@ __version__text__ = "1"
 class Item(db.Model):
     id = db.Column(db.Integer, primary_key=True, autoincrement=True)
     name = db.Column(db.String, nullable=False)
-    creation_date = db.Column(db.TIMESTAMP, nullable=False, server_default=func.now())
+    upload_date = db.Column(db.TIMESTAMP, nullable=False, server_default=func.now())
+
+    uploader_id = db.Column(db.Integer, db.ForeignKey("user.id", ondelete="CASCADE"), nullable=False)
+    uploader = db.relationship("User", backref=db.backref("uploads", lazy=True))
\ No newline at end of file
diff --git a/src/models/purchase.py b/src/models/purchase.py
new file mode 100644
index 0000000..f494841
--- /dev/null
+++ b/src/models/purchase.py
@@ -0,0 +1,15 @@
+#!/usr/bin/env python3
+from sqlalchemy import func
+
+from . import db
+
+
+class Purchase(db.Model):
+    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
+    timestamp = db.Column(db.TIMESTAMP, nullable=False, server_default=func.now())
+
+    purchaser_id = db.Column(db.Integer, db.ForeignKey("user.id", ondelete="CASCADE"), nullable=False)
+    purchaser = db.relationship("User", backref=db.backref("purchases", lazy=True))
+
+    item_id = db.Column(db.Integer, db.ForeignKey("item.id", ondelete="CASCADE"), nullable=False)
+    item = db.relationship("Item", backref=db.backref("purchases", lazy=True))
diff --git a/src/models/role.py b/src/models/role.py
index 13fb9ae..24bf6f3 100644
--- a/src/models/role.py
+++ b/src/models/role.py
@@ -1,7 +1,7 @@
 #!/usr/bin/env python3
 from flask_security import RoleMixin
 
-from utils import db
+from . import db
 
 """
 Role model
diff --git a/src/models/user.py b/src/models/user.py
index 571cd21..23eb68e 100644
--- a/src/models/user.py
+++ b/src/models/user.py
@@ -2,7 +2,7 @@
 from flask_security import UserMixin
 
 from .role import roles_users
-from utils import db
+from . import db
 
 """
 User model
diff --git a/src/utils/__init__.py b/src/utils/__init__.py
index 00c6359..9c6427a 100644
--- a/src/utils/__init__.py
+++ b/src/utils/__init__.py
@@ -1,3 +1,2 @@
-from .db import db
 from .healthchecks import health_database_status
 from .security import security, user_datastore
diff --git a/src/utils/config.py b/src/utils/config.py
index 5414803..13ffdc5 100644
--- a/src/utils/config.py
+++ b/src/utils/config.py
@@ -19,10 +19,7 @@ SENTRY_DSN = os.environ.get("SENTRY_DSN")
 RELEASE_ID = os.environ.get("RELEASE_ID", "test")
 RELEASEMODE = os.environ.get("RELEASEMODE", "dev")
 
-POSTGRES_HOSTNAME = os.getenv("POSTGRES_HOSTNAME", "localhost")
-POSTGRES_USERNAME = os.getenv("POSTGRES_USERNAME", "webshop")
-POSTGRES_PASSWORD = os.getenv("POSTGRES_PASSWORD", "webshop")
-POSTGRES_DB = os.getenv("POSTGRES_DB", "webshop")
+SQLALCHEMY_URI = os.environ.get("SQLALCHEMY_URI", "sqlite://")
 
 SECRET_KEY = os.getenv("SECRET_KEY")
 ALLOWED_ORIGINS = os.environ.get('ALLOWED_ORIGINS', '*')
diff --git a/src/utils/healthchecks.py b/src/utils/healthchecks.py
index 6fe0a58..f9403f8 100644
--- a/src/utils/healthchecks.py
+++ b/src/utils/healthchecks.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 
-from .db import db
+from models.db import db
 
 """
 Healthchek functions
diff --git a/src/utils/security.py b/src/utils/security.py
index 12f4ecc..9de9b8e 100644
--- a/src/utils/security.py
+++ b/src/utils/security.py
@@ -11,8 +11,7 @@ __version__text__ = "1"
 
 from flask_security import Security, SQLAlchemyUserDatastore
 
-from models import User, Role
-from utils import db
+from models import db, User, Role
 
 user_datastore = SQLAlchemyUserDatastore(db, User, Role)
 security = Security()