diff --git a/README.md b/README.md
index ac1558e..2902157 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,8 @@ Lyrics are fetched using a fallback pipeline (first synced result wins):
 
 ## Usage
 
+See `lrcfetch --help` for full command reference. Common use cases:
+
 ```bash
 # Fetch lyrics for the currently playing track
 lrcfetch fetch
diff --git a/lrcfetch/cli.py b/lrcfetch/cli.py
index 8318761..9f9ab8a 100644
--- a/lrcfetch/cli.py
+++ b/lrcfetch/cli.py
@@ -12,7 +12,7 @@ from lrcfetch.mpris import get_current_track
 from lrcfetch.core import LrcManager
 
 app = typer.Typer(
-    help="LRCFetch — Fetch lyrics for tracks.",
+    help="LRCFetch — Fetch line-synced lyrics for your music player.",
     add_completion=False,
 )
 
diff --git a/lrcfetch/config.py b/lrcfetch/config.py
index bf75ce7..436d872 100644
--- a/lrcfetch/config.py
+++ b/lrcfetch/config.py
@@ -20,7 +20,7 @@ load_dotenv()              # .env in cwd (does NOT override existing vars)
 HTTP_TIMEOUT = 10.0
 
 # ─── Cache TTLs (seconds) ───────────────────────────────────────────
-TTL_SYNCED = 86400 * 30       # 30 days
+TTL_SYNCED = None             # never expires
 TTL_UNSYNCED = 86400           # 1 day
 TTL_NOT_FOUND = 86400 * 3     # 3 days
 TTL_NETWORK_ERROR = 3600       # 1 hour
diff --git a/lrcfetch/core.py b/lrcfetch/core.py
index 56c9654..a6b7f64 100644
--- a/lrcfetch/core.py
+++ b/lrcfetch/core.py
@@ -47,7 +47,7 @@ def _normalize_unsynced(lyrics: str) -> str:
 
 
 # Maps CacheStatus to the default TTL used when storing results
-_STATUS_TTL: dict[CacheStatus, int] = {
+_STATUS_TTL: dict[CacheStatus, Optional[int]] = {
     CacheStatus.SUCCESS_SYNCED: TTL_SYNCED,
     CacheStatus.SUCCESS_UNSYNCED: TTL_UNSYNCED,
     CacheStatus.NOT_FOUND: TTL_NOT_FOUND,
diff --git a/pyproject.toml b/pyproject.toml
index 7d9e387..dd25c62 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,7 +5,7 @@ build-backend = "hatchling.build"
 [project]
 name = "lrcfetch"
 version = "0.1.0"
-description = "Fetch lyrics for tracks."
+description = "Fetch line-synced lyrics for your music player."
 readme = "README.md"
 requires-python = ">=3.13"
 dependencies = [