diff --git a/src/database/__init__.py b/core/database/__init__.py
similarity index 100%
rename from src/database/__init__.py
rename to core/database/__init__.py
diff --git a/src/database/classes.py b/core/database/classes.py
similarity index 100%
rename from src/database/classes.py
rename to core/database/classes.py
diff --git a/src/database/database.py b/core/database/database.py
similarity index 51%
rename from src/database/database.py
rename to core/database/database.py
index 8f10ac8..3d73964 100644
--- a/src/database/database.py
+++ b/core/database/database.py
@@ -1,24 +1,27 @@
-from pymongo import MongoClient
-from dotenv import load_dotenv
+from __future__ import annotations
+
 import logging
 import os
 
+from dotenv import load_dotenv
+from pymongo import MongoClient
+
 
 def connect():
     """Connect to MongoDB."""
     # load env vars
     load_dotenv()
     necessary_env_vars = [
-        "MONGO_HOST",
-        "MONGO_DB",
-        "MONGO_COLLECTION"
+        'MONGO_HOST',
+        'MONGO_DB',
+        'MONGO_COLLECTION',
     ]
     for env_var in necessary_env_vars:
         assert env_var in os.environ, f"{env_var} not found"
     # connect to database
-    client = MongoClient(os.getenv("MONGO_HOST"))
-    db = client[os.getenv("MONGO_DB")]
-    collection = db[os.getenv("MONGO_COLLECTION")]
-    collection.create_index("name", unique=True)
-    logging.info("connected to database")
+    client = MongoClient(os.getenv('MONGO_HOST'))
+    db = client[os.getenv('MONGO_DB')]
+    collection = db[os.getenv('MONGO_COLLECTION')]
+    collection.create_index('name', unique=True)
+    logging.info('connected to database')
     return collection, db, client
diff --git a/src/database/utils.py b/core/database/utils.py
similarity index 100%
rename from src/database/utils.py
rename to core/database/utils.py