diff --git a/run.py b/run.py
index 2ba61d0c9..57fc3467a 100644
--- a/run.py
+++ b/run.py
@@ -11,7 +11,6 @@
 import uvicorn
 from fastapi import FastAPI, HTTPException
 from fastapi.responses import HTMLResponse
-from fastapi.templating import Jinja2Templates
 
 from voicevox_engine import __version__
 from voicevox_engine.app.dependencies import deprecated_mutable_api
@@ -120,12 +119,6 @@ async def lifespan(app: FastAPI) -> AsyncIterator[None]:
 
     metas_store = MetasStore(root_dir / "speaker_info")
 
-    setting_ui_template = Jinja2Templates(
-        directory=engine_root() / "ui_template",
-        variable_start_string="<JINJA_PRE>",
-        variable_end_string="<JINJA_POST>",
-    )
-
     def get_engine(core_version: Optional[str]) -> TTSEngine:
         if core_version is None:
             return tts_engines[latest_core_version]
@@ -157,11 +150,7 @@ def get_core(core_version: Optional[str]) -> CoreAdapter:
     app.include_router(
         generate_engine_info_router(get_core, cores, engine_manifest_data)
     )
-    app.include_router(
-        generate_setting_router(
-            setting_loader, engine_manifest_data, setting_ui_template
-        )
-    )
+    app.include_router(generate_setting_router(setting_loader, engine_manifest_data))
 
     @app.get("/", response_class=HTMLResponse, tags=["その他"])
     async def get_portal() -> str:
diff --git a/voicevox_engine/app/routers/setting.py b/voicevox_engine/app/routers/setting.py
index f52855375..7207533de 100644
--- a/voicevox_engine/app/routers/setting.py
+++ b/voicevox_engine/app/routers/setting.py
@@ -8,14 +8,20 @@
 from voicevox_engine.engine_manifest.EngineManifest import EngineManifest
 from voicevox_engine.setting.Setting import CorsPolicyMode, Setting
 from voicevox_engine.setting.SettingLoader import SettingHandler
+from voicevox_engine.utility.path_utility import engine_root
 
 from ..dependencies import check_disabled_mutable_api
 
+_setting_ui_template = Jinja2Templates(
+    directory=engine_root() / "ui_template",
+    variable_start_string="<JINJA_PRE>",
+    variable_end_string="<JINJA_POST>",
+)
+
 
 def generate_setting_router(
     setting_loader: SettingHandler,
     engine_manifest_data: EngineManifest,
-    setting_ui_template: Jinja2Templates,
 ) -> APIRouter:
     """設定 API Router を生成する"""
     router = APIRouter()
@@ -34,7 +40,7 @@ def setting_get(request: Request) -> Response:
         if allow_origin is None:
             allow_origin = ""
 
-        return setting_ui_template.TemplateResponse(
+        return _setting_ui_template.TemplateResponse(
             "ui.html",
             {
                 "request": request,