diff --git a/src/library/library.cr b/src/library/library.cr
index b8528f3..a3f2baa 100644
--- a/src/library/library.cr
+++ b/src/library/library.cr
@@ -18,7 +18,7 @@ class Library
   def self.load_instance
     dir = Config.current.library_path
     return unless Dir.exists? dir
-    instance_file_path = File.join path, "library.yml.zip"
+    instance_file_path = File.join dir, "library.yml.zip"
     return unless File.exists? instance_file_path
 
     zip_file = Compress::Zip::File.new instance_file_path
@@ -38,7 +38,7 @@ class Library
 
     zip_file.close
 
-    scan
+    Library.default.scan
   end
 
   def initialize
diff --git a/src/library/title.cr b/src/library/title.cr
index 899e21f..6c873b8 100644
--- a/src/library/title.cr
+++ b/src/library/title.cr
@@ -10,9 +10,13 @@ class Title
     entry_cover_url_cache : Hash(String, String)?
   setter entry_cover_url_cache : Hash(String, String)?
 
+  @[YAML::Field(ignore: true)]
   @entry_display_name_cache : Hash(String, String)?
+  @[YAML::Field(ignore: true)]
   @entry_cover_url_cache : Hash(String, String)?
+  @[YAML::Field(ignore: true)]
   @cached_display_name : String?
+  @[YAML::Field(ignore: true)]
   @cached_cover_url : String?
 
   def initialize(@dir : String, @parent_id)