diff --git a/src/collection/mod.rs b/src/collection/mod.rs
index 62352ad..e21039a 100644
--- a/src/collection/mod.rs
+++ b/src/collection/mod.rs
@@ -56,18 +56,15 @@ pub trait CollectionManager {
 
 /// The collection manager. It is responsible for pulling information from both the library and the
 /// database, ensuring its consistent and writing back any changes.
-pub struct MhCollectionManager {
-    library: Box<dyn Library + Send + Sync>,
+pub struct MhCollectionManager<L> {
+    library: L,
     database: Box<dyn Database + Send + Sync>,
     collection: Collection,
 }
 
-impl MhCollectionManager {
+impl<L: Library> MhCollectionManager<L> {
     /// Create a new [`CollectionManager`] with the provided [`Library`] and [`Database`].
-    pub fn new(
-        library: Box<dyn Library + Send + Sync>,
-        database: Box<dyn Database + Send + Sync>,
-    ) -> Self {
+    pub fn new(library: L, database: Box<dyn Database + Send + Sync>) -> Self {
         MhCollectionManager {
             library,
             database,
@@ -76,7 +73,7 @@ impl MhCollectionManager {
     }
 }
 
-impl CollectionManager for MhCollectionManager {
+impl<L: Library> CollectionManager for MhCollectionManager<L> {
     fn rescan_library(&mut self) -> Result<(), Error> {
         self.collection = self.library.list(&Query::default())?;
         Ok(())
@@ -127,8 +124,7 @@ mod tests {
             .times(1)
             .return_once(|_| database_result);
 
-        let mut collection_manager =
-            MhCollectionManager::new(Box::new(library), Box::new(database));
+        let mut collection_manager = MhCollectionManager::new(library, Box::new(database));
 
         collection_manager.rescan_library().unwrap();
         assert_eq!(collection_manager.get_collection(), &*COLLECTION);
@@ -147,8 +143,7 @@ mod tests {
             .times(1)
             .return_once(|_| library_result);
 
-        let mut collection_manager =
-            MhCollectionManager::new(Box::new(library), Box::new(database));
+        let mut collection_manager = MhCollectionManager::new(library, Box::new(database));
 
         let actual_err = collection_manager.rescan_library().unwrap_err();
         let expected_err = Error::LibraryError(
@@ -171,8 +166,7 @@ mod tests {
             .times(1)
             .return_once(|_| database_result);
 
-        let mut collection_manager =
-            MhCollectionManager::new(Box::new(library), Box::new(database));
+        let mut collection_manager = MhCollectionManager::new(library, Box::new(database));
 
         let actual_err = collection_manager.save_to_database().unwrap_err();
         let expected_err =
diff --git a/src/main.rs b/src/main.rs
index 81a8fab..545e453 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -49,7 +49,7 @@ fn main() {
         &opt.database_file_path,
     )));
 
-    let collection_manager = MhCollectionManager::new(Box::new(beets), Box::new(database));
+    let collection_manager = MhCollectionManager::new(beets, Box::new(database));
 
     // Initialize the terminal user interface.
     let backend = CrosstermBackend::new(io::stdout());