diff --git a/app/routers/airline.py b/app/routers/airline.py
index 7ebfb46..b7d251f 100644
--- a/app/routers/airline.py
+++ b/app/routers/airline.py
@@ -1,5 +1,5 @@
 from typing import Union
-from typing_extensions import Annotated
+from typing import Annotated
 
 from couchbase.exceptions import DocumentExistsException, DocumentNotFoundException
 from app.db import get_db
@@ -95,7 +95,7 @@ def get_airlines_list(
         airlines = [r for r in result]
         return airlines
     except Exception as e:
-        return f"Unexpected error: {e}", 500
+        raise HTTPException(status_code=500, detail=f"Unexpected error: {e}")
 
 
 @router.get(
@@ -153,7 +153,7 @@ def get_airlines_to_airport(
         airlines = [r for r in result]
         return airlines
     except Exception as e:
-        return HTTPException(status_code=500, detail=f"Unexpected error: {e}")
+        raise HTTPException(status_code=500, detail=f"Unexpected error: {e}")
 
 
 @router.get(
diff --git a/app/routers/airport.py b/app/routers/airport.py
index 7fc3f68..2cde684 100644
--- a/app/routers/airport.py
+++ b/app/routers/airport.py
@@ -1,5 +1,5 @@
 from typing import Union
-from typing_extensions import Annotated
+from typing import Annotated
 
 from couchbase.exceptions import DocumentExistsException, DocumentNotFoundException
 from app.db import get_db as CouchbaseClient
@@ -114,7 +114,7 @@ def get_airports_list(
         airports = [r for r in result]
         return airports
     except Exception as e:
-        return f"Unexpected error: {e}", 500
+        raise HTTPException(status_code=500, detail=f"Unexpected error: {e}")
 
 
 class DestinationAirport(BaseModel):
@@ -174,7 +174,7 @@ def get_airport_direct_connections(
         airports = [r for r in result]
         return airports
     except Exception as e:
-        return HTTPException(status_code=500, detail=f"Unexpected error: {e}")
+        raise HTTPException(status_code=500, detail=f"Unexpected error: {e}")
 
 
 @router.get(
diff --git a/app/routers/hotel.py b/app/routers/hotel.py
index c55a7d8..e56c29c 100644
--- a/app/routers/hotel.py
+++ b/app/routers/hotel.py
@@ -1,5 +1,5 @@
 from typing import List, Optional
-from typing_extensions import Annotated
+from typing import Annotated
 
 from app.db import get_db as CouchbaseClient
 from fastapi import APIRouter, Depends, HTTPException, Query
diff --git a/app/routers/route.py b/app/routers/route.py
index 11350ba..af6f231 100644
--- a/app/routers/route.py
+++ b/app/routers/route.py
@@ -1,5 +1,5 @@
 from typing import Union
-from typing_extensions import Annotated
+from typing import Annotated
 
 from couchbase.exceptions import DocumentExistsException, DocumentNotFoundException
 from app.db import get_db as CouchbaseClient
diff --git a/requirements.txt b/requirements.txt
index 8c4f2f7..2d717ba 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@ couchbase==4.6.1
 fastapi==0.136.1
 httpx==0.28.1
 pydantic==2.13.3
-pydantic_settings==2.14.0
+pydantic-settings==2.14.0
 pytest==9.0.3
 python-dotenv==1.2.2
-uvicorn==0.46.0
\ No newline at end of file
+uvicorn==0.46.0