diff --git a/backend/core/conf.py b/backend/core/conf.py
index ffb5e51..119e374 100644
--- a/backend/core/conf.py
+++ b/backend/core/conf.py
@@ -35,8 +35,8 @@ class Settings(BaseSettings):
     FASTAPI_TITLE: str = 'FastAPI'
     FASTAPI_VERSION: str = '0.0.1'
     FASTAPI_DESCRIPTION: str = 'FastAPI Best Architecture'
-    FASTAPI_DOCS_URL: str | None = '/docs'
-    FASTAPI_REDOCS_URL: str | None = '/redocs'
+    FASTAPI_DOCS_URL: str = '/docs'
+    FASTAPI_REDOC_URL: str = '/redoc'
     FASTAPI_OPENAPI_URL: str | None = '/openapi'
     FASTAPI_STATIC_FILES: bool = False
 
@@ -44,7 +44,7 @@ class Settings(BaseSettings):
     @classmethod
     def validator_api_url(cls, values):
         if values['ENVIRONMENT'] == 'pro':
-            values['OPENAPI_URL'] = None
+            values['FASTAPI_OPENAPI_URL'] = None
             values['FASTAPI_STATIC_FILES'] = False
         return values
 
diff --git a/backend/core/registrar.py b/backend/core/registrar.py
index fe9d26d..379d44d 100644
--- a/backend/core/registrar.py
+++ b/backend/core/registrar.py
@@ -50,7 +50,7 @@ def register_app():
         version=settings.FASTAPI_VERSION,
         description=settings.FASTAPI_DESCRIPTION,
         docs_url=settings.FASTAPI_DOCS_URL,
-        redoc_url=settings.FASTAPI_REDOCS_URL,
+        redoc_url=settings.FASTAPI_REDOC_URL,
         openapi_url=settings.FASTAPI_OPENAPI_URL,
         lifespan=register_init,
     )