diff --git a/backend/app/routers/items.py b/backend/app/routers/items.py
index 213f98c..0e0c0f3 100644
--- a/backend/app/routers/items.py
+++ b/backend/app/routers/items.py
@@ -135,7 +135,6 @@ async def get_item(
 @router.get("/{item_id}/cover")
 async def get_cover(
     item_id: str,
-    current_user: User = Depends(get_current_user),
     db: AsyncSession = Depends(get_db),
 ):
     result = await db.execute(select(LibraryItem).where(LibraryItem.id == item_id))
@@ -144,7 +143,9 @@ async def get_cover(
         raise HTTPException(status_code=404, detail="Cover not found")
     if not os.path.exists(item.cover_path):
         raise HTTPException(status_code=404, detail="Cover file missing")
-    return FileResponse(item.cover_path, media_type="image/jpeg")
+    ext = os.path.splitext(item.cover_path)[1].lower()
+    media_type = "image/png" if ext == ".png" else "image/jpeg"
+    return FileResponse(item.cover_path, media_type=media_type)
 
 
 @router.patch("/{item_id}")