diff --git a/cookie_api/commands.py b/cookie_api/commands.py
index b834c67..9c06112 100644
--- a/cookie_api/commands.py
+++ b/cookie_api/commands.py
@@ -3,6 +3,7 @@ from apistar.backends.sqlalchemy_backend import Session
 
 from models.schema import User
 
+
 def create_user(session: Session, email, password):
     user = User(email, password)
     session.add(user)
@@ -12,4 +13,4 @@ def create_user(session: Session, email, password):
 
 commands = [
     Command('create_user', create_user)
-]
\ No newline at end of file
+]
diff --git a/cookie_api/models/util.py b/cookie_api/models/util.py
index be07f85..1351458 100644
--- a/cookie_api/models/util.py
+++ b/cookie_api/models/util.py
@@ -1,9 +1,10 @@
 import datetime as dt
 import decimal
 
+
 def alchemyencoder(obj):
-    """JSON encoder function for SQLAlchemy special classes."""
+    """JSON encoder function with support for ISO 8601 datetime serialization and Decimal to float casting"""
     if isinstance(obj, dt.datetime):
         return obj.isoformat()
     elif isinstance(obj, decimal.Decimal):
-        return float(obj)
\ No newline at end of file
+        return float(obj)