diff --git a/helper/install.sh b/helper/install.sh
index f608f3b..a0595db 100755
--- a/helper/install.sh
+++ b/helper/install.sh
@@ -83,7 +83,7 @@ uninstall_backend() {
 
     sudo rm /etc/supervisor/conf.d/$SUPERVISOR_CFG
 
-    rm -rf $TARGET_DIR
+    rm -rf $TARGET_DIR/src $TARGET_DIR/requirements.txt $TARGET_DIR/venv
 
     echo "Uninstallation complete."
 }
diff --git a/src/main.py b/src/main.py
index f4d3ce5..9eadbc8 100644
--- a/src/main.py
+++ b/src/main.py
@@ -29,6 +29,7 @@ async def _lifespan(_app: FastAPI):  # noqa: ANN202
     await location_recorder.create_db_engine()
     yield
     await mqtt.stop()
+    await location_recorder.dispose_db_engine()
 
 
 app = FastAPI(lifespan=_lifespan)
diff --git a/src/util/location_recorder.py b/src/util/location_recorder.py
index a1591d1..f6158a8 100644
--- a/src/util/location_recorder.py
+++ b/src/util/location_recorder.py
@@ -41,6 +41,9 @@ class LocationRecorder:
         async with self._engine.begin() as conn:
             await conn.run_sync(Base.metadata.create_all)
 
+    async def dispose_db_engine(self) -> None:
+        await self._engine.dispose()
+
     async def insert_location(self, people: str, datetime: str, location: LocationData) -> None:
         async with self._engine.connect() as conn:
             await conn.execute(
@@ -53,6 +56,7 @@ class LocationRecorder:
                 ),
             )
             await conn.commit()
+            await conn.aclose()
 
     async def insert_location_now(self, people: str, location: LocationData) -> None:
         now = datetime.datetime.now(tz=datetime.UTC)