diff --git a/backend/open_webui/config.py b/backend/open_webui/config.py
index ed73e7d83..349c35ce5 100644
--- a/backend/open_webui/config.py
+++ b/backend/open_webui/config.py
@@ -699,16 +699,16 @@ AZURE_STORAGE_KEY = os.environ.get("AZURE_STORAGE_KEY", None)
 # File Upload DIR
 ####################################
 
-UPLOAD_DIR = f"{DATA_DIR}/uploads"
-Path(UPLOAD_DIR).mkdir(parents=True, exist_ok=True)
+UPLOAD_DIR = DATA_DIR / "uploads"
+UPLOAD_DIR.mkdir(parents=True, exist_ok=True)
 
 
 ####################################
 # Cache DIR
 ####################################
 
-CACHE_DIR = f"{DATA_DIR}/cache"
-Path(CACHE_DIR).mkdir(parents=True, exist_ok=True)
+CACHE_DIR = DATA_DIR / "cache"
+CACHE_DIR.mkdir(parents=True, exist_ok=True)
 
 
 ####################################
diff --git a/backend/open_webui/routers/audio.py b/backend/open_webui/routers/audio.py
index c949e65a4..d6f74eac4 100644
--- a/backend/open_webui/routers/audio.py
+++ b/backend/open_webui/routers/audio.py
@@ -54,7 +54,7 @@ MAX_FILE_SIZE = MAX_FILE_SIZE_MB * 1024 * 1024  # Convert MB to bytes
 log = logging.getLogger(__name__)
 log.setLevel(SRC_LOG_LEVELS["AUDIO"])
 
-SPEECH_CACHE_DIR = Path(CACHE_DIR).joinpath("./audio/speech/")
+SPEECH_CACHE_DIR = CACHE_DIR / "audio" / "speech"
 SPEECH_CACHE_DIR.mkdir(parents=True, exist_ok=True)
 
 
diff --git a/backend/open_webui/routers/functions.py b/backend/open_webui/routers/functions.py
index ac2db9322..206610138 100644
--- a/backend/open_webui/routers/functions.py
+++ b/backend/open_webui/routers/functions.py
@@ -74,7 +74,7 @@ async def create_new_function(
 
             function = Functions.insert_new_function(user.id, function_type, form_data)
 
-            function_cache_dir = Path(CACHE_DIR) / "functions" / form_data.id
+            function_cache_dir = CACHE_DIR / "functions" / form_data.id
             function_cache_dir.mkdir(parents=True, exist_ok=True)
 
             if function:
diff --git a/backend/open_webui/routers/images.py b/backend/open_webui/routers/images.py
index f8be93719..c51d2f996 100644
--- a/backend/open_webui/routers/images.py
+++ b/backend/open_webui/routers/images.py
@@ -25,7 +25,7 @@ from pydantic import BaseModel
 log = logging.getLogger(__name__)
 log.setLevel(SRC_LOG_LEVELS["IMAGES"])
 
-IMAGE_CACHE_DIR = Path(CACHE_DIR).joinpath("./image/generations/")
+IMAGE_CACHE_DIR = CACHE_DIR / "image" / "generations"
 IMAGE_CACHE_DIR.mkdir(parents=True, exist_ok=True)
 
 
diff --git a/backend/open_webui/routers/openai.py b/backend/open_webui/routers/openai.py
index 470deb0a5..73b182d3c 100644
--- a/backend/open_webui/routers/openai.py
+++ b/backend/open_webui/routers/openai.py
@@ -192,7 +192,7 @@ async def speech(request: Request, user=Depends(get_verified_user)):
         body = await request.body()
         name = hashlib.sha256(body).hexdigest()
 
-        SPEECH_CACHE_DIR = Path(CACHE_DIR).joinpath("./audio/speech/")
+        SPEECH_CACHE_DIR = CACHE_DIR / "audio" / "speech"
         SPEECH_CACHE_DIR.mkdir(parents=True, exist_ok=True)
         file_path = SPEECH_CACHE_DIR.joinpath(f"{name}.mp3")
         file_body_path = SPEECH_CACHE_DIR.joinpath(f"{name}.json")
diff --git a/backend/open_webui/routers/tools.py b/backend/open_webui/routers/tools.py
index 5e4109037..211264cde 100644
--- a/backend/open_webui/routers/tools.py
+++ b/backend/open_webui/routers/tools.py
@@ -105,7 +105,7 @@ async def create_new_tools(
             specs = get_tools_specs(TOOLS[form_data.id])
             tools = Tools.insert_new_tool(user.id, form_data, specs)
 
-            tool_cache_dir = Path(CACHE_DIR) / "tools" / form_data.id
+            tool_cache_dir = CACHE_DIR / "tools" / form_data.id
             tool_cache_dir.mkdir(parents=True, exist_ok=True)
 
             if tools:
diff --git a/backend/open_webui/utils/pdf_generator.py b/backend/open_webui/utils/pdf_generator.py
index 8b04dd81b..c137b49da 100644
--- a/backend/open_webui/utils/pdf_generator.py
+++ b/backend/open_webui/utils/pdf_generator.py
@@ -110,7 +110,7 @@ class PDFGenerator:
             # When running using `pip install -e .` the static directory is in the site packages.
             # This path only works if `open-webui serve` is run from the root of this project.
             if not FONTS_DIR.exists():
-                FONTS_DIR = Path("./backend/static/fonts")
+                FONTS_DIR = Path(".") / "backend" / "static" / "fonts"
 
             pdf.add_font("NotoSans", "", f"{FONTS_DIR}/NotoSans-Regular.ttf")
             pdf.add_font("NotoSans", "b", f"{FONTS_DIR}/NotoSans-Bold.ttf")