diff --git a/backend/apps/web/routers/utils.py b/backend/apps/web/routers/utils.py
index 0bb3ea3c..9adf2801 100644
--- a/backend/apps/web/routers/utils.py
+++ b/backend/apps/web/routers/utils.py
@@ -111,12 +111,12 @@ def upload(file: UploadFile = File(...)):
     file_path = f"{UPLOAD_DIR}/{file.filename}"
 
     # Save file in chunks
-    with file_path.open("wb+") as f:
+    with open(file_path, "wb+") as f:
         for chunk in file.file:
             f.write(chunk)
 
     def file_process_stream():
-        total_size = os.path.getsize(str(file_path))
+        total_size = os.path.getsize(file_path)
         chunk_size = 1024 * 1024
         try:
             with open(file_path, "rb") as f:
diff --git a/backend/config.py b/backend/config.py
index 59ef1947..169baa69 100644
--- a/backend/config.py
+++ b/backend/config.py
@@ -25,12 +25,13 @@ except ImportError:
 # File Upload
 ####################################
 
-DATA_DIR = Path(os.getenv("DATA_DIR", "./data")).resolve()
+DATA_DIR = str(Path(os.getenv("DATA_DIR", "./data")).resolve())
 
 UPLOAD_DIR = f"{DATA_DIR}/uploads"
-UPLOAD_DIR.mkdir(parents=True, exist_ok=True)
 
-FRONTEND_BUILD_DIR = Path(os.getenv("FRONTEND_BUILD_DIR", "../build"))
+Path(UPLOAD_DIR).mkdir(parents=True, exist_ok=True)
+
+FRONTEND_BUILD_DIR = str(Path(os.getenv("FRONTEND_BUILD_DIR", "../build")))
 
 ####################################
 # ENV (dev,test,prod)
@@ -88,7 +89,7 @@ if WEBUI_AUTH and WEBUI_JWT_SECRET_KEY == "":
 CHROMA_DATA_PATH = f"{DATA_DIR}/vector_db"
 EMBED_MODEL = "all-MiniLM-L6-v2"
 CHROMA_CLIENT = chromadb.PersistentClient(
-    path=str(CHROMA_DATA_PATH), settings=Settings(allow_reset=True)
+    path=CHROMA_DATA_PATH, settings=Settings(allow_reset=True)
 )
 CHUNK_SIZE = 1500
 CHUNK_OVERLAP = 100
diff --git a/backend/main.py b/backend/main.py
index a0ad73fd..f7a82b66 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -60,6 +60,6 @@ app.mount("/rag/api/v1", rag_app)
 
 app.mount(
     "/",
-    SPAStaticFiles(directory=str(FRONTEND_BUILD_DIR), html=True),
+    SPAStaticFiles(directory=FRONTEND_BUILD_DIR, html=True),
     name="spa-static-files",
 )