diff --git a/gns3server/controller/__init__.py b/gns3server/controller/__init__.py
index 2774dd0f..c52dbcfa 100644
--- a/gns3server/controller/__init__.py
+++ b/gns3server/controller/__init__.py
@@ -17,7 +17,6 @@
 
 import os
 import sys
-import json
 import uuid
 import socket
 import shutil
@@ -30,7 +29,6 @@ from .appliance_manager import ApplianceManager
 from .compute import Compute, ComputeError
 from .notification import Notification
 from .symbols import Symbols
-from ..version import __version__
 from .topology import load_topology
 from .gns3vm import GNS3VM
 from ..utils.get_resource import get_resource
diff --git a/gns3server/db/tasks.py b/gns3server/db/tasks.py
index fb53ed4f..567ce272 100644
--- a/gns3server/db/tasks.py
+++ b/gns3server/db/tasks.py
@@ -22,6 +22,8 @@ from fastapi.encoders import jsonable_encoder
 from pydantic import ValidationError
 
 from typing import List
+from sqlalchemy import event
+from sqlalchemy.engine import Engine
 from sqlalchemy.exc import SQLAlchemyError
 from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession
 from gns3server.db.repositories.computes import ComputesRepository
@@ -49,6 +51,16 @@ async def connect_to_db(app: FastAPI) -> None:
         log.error(f"Error while connecting to database '{db_url}: {e}")
 
 
+@event.listens_for(Engine, "connect")
+def set_sqlite_pragma(dbapi_connection, connection_record):
+
+    # Enable SQL foreign key support for SQLite
+    # https://docs.sqlalchemy.org/en/14/dialects/sqlite.html#foreign-key-support
+    cursor = dbapi_connection.cursor()
+    cursor.execute("PRAGMA foreign_keys=ON")
+    cursor.close()
+
+
 async def get_computes(app: FastAPI) -> List[dict]:
 
     computes = []
diff --git a/tests/api/routes/controller/test_templates.py b/tests/api/routes/controller/test_templates.py
index 67389073..2c008558 100644
--- a/tests/api/routes/controller/test_templates.py
+++ b/tests/api/routes/controller/test_templates.py
@@ -97,7 +97,7 @@ class TestTemplateRoutes:
         assert response.status_code == status.HTTP_200_OK
         assert response.json()["name"] == "VPCS_TEST_RENAMED"
 
-    async def test_template_delete(self, app: FastAPI, client: AsyncClient, controller: Controller) -> None:
+    async def test_template_delete(self, app: FastAPI, client: AsyncClient) -> None:
 
         template_id = str(uuid.uuid4())
         params = {"template_id": template_id,