diff --git a/lrx_cli/cache.py b/lrx_cli/cache.py
index 7e16fc3..8699298 100644
--- a/lrx_cli/cache.py
+++ b/lrx_cli/cache.py
@@ -12,7 +12,7 @@ import unicodedata
 from typing import Optional
 from loguru import logger
 
-from .config import DB_PATH, DURATION_TOLERANCE_MS
+from .config import DURATION_TOLERANCE_MS
 from .models import TrackMeta, LyricResult, CacheStatus
 
 # Punctuation to strip for fuzzy matching (ASCII + fullwidth + CJK brackets/symbols)
@@ -88,7 +88,7 @@ def _generate_key(track: TrackMeta, source: str) -> str:
 
 
 class CacheEngine:
-    def __init__(self, db_path: str = DB_PATH):
+    def __init__(self, db_path: str):
         self.db_path = db_path
         self._init_db()
 
diff --git a/lrx_cli/cli.py b/lrx_cli/cli.py
index 9d4c165..d4ec25a 100644
--- a/lrx_cli/cli.py
+++ b/lrx_cli/cli.py
@@ -66,7 +66,7 @@ def launcher(
     if debug:
         enable_debug()
     _player = player
-    _db_path = str(Path(db_path).resolve()) if db_path else None
+    _db_path = str(Path(db_path).resolve()) if db_path else DB_PATH
     global manager
     manager = LrcManager(db_path=_db_path)
     app(tokens)
diff --git a/lrx_cli/core.py b/lrx_cli/core.py
index 9fe04b9..5134a8d 100644
--- a/lrx_cli/core.py
+++ b/lrx_cli/core.py
@@ -19,7 +19,7 @@ from .fetchers import FetcherMethodType, create_fetchers
 from .fetchers.base import BaseFetcher
 from .cache import CacheEngine
 from .lrc import normalize_tags, normalize_unsynced, detect_sync_status
-from .config import DB_PATH, TTL_SYNCED, TTL_UNSYNCED, TTL_NOT_FOUND, TTL_NETWORK_ERROR
+from .config import TTL_SYNCED, TTL_UNSYNCED, TTL_NOT_FOUND, TTL_NETWORK_ERROR
 from .models import TrackMeta, LyricResult, CacheStatus
 from .enrichers import enrich_track
 
@@ -36,8 +36,8 @@ _STATUS_TTL: dict[CacheStatus, Optional[int]] = {
 class LrcManager:
     """Main entry point for fetching lyrics with caching."""
 
-    def __init__(self, db_path: Optional[str] = None) -> None:
-        self.cache = CacheEngine(db_path=db_path if db_path else DB_PATH)
+    def __init__(self, db_path: str) -> None:
+        self.cache = CacheEngine(db_path=db_path)
         self.fetchers = create_fetchers(self.cache)
 
     def _build_sequence(