diff --git a/README.md b/README.md
index cbdfc76e..70edc48c 100644
--- a/README.md
+++ b/README.md
@@ -277,7 +277,7 @@ Reads the Photos library database and returns a PhotosDB object.
 
 Pass the path to a Photos library or to a specific database file (e.g. "/Users/smith/Pictures/Photos Library.photoslibrary" or "/Users/smith/Pictures/Photos Library.photoslibrary/database/photos.db").  Normally, it's recommended you pass the path the .photoslibrary folder, not the actual database path.  The latter option is provided for debugging -- e.g. for reading a database file if you don't have the entire library. Path to photos library may be passed **either** as first argument **or** as named argument `dbfile`. **Note**: In Photos, users may specify a different library to open by holding down the *option* key while opening Photos.app. See also [get_last_library_path](#get_last_library_path) and [get_system_library_path](#get_system_library_path)
 
-If an invalid path is passed, PhotosDB will raise `ValueError` exception.
+If an invalid path is passed, PhotosDB will raise `FileNotFoundError` exception.
 
 **Note**: If neither path or dbfile is passed, PhotosDB will use get_last_library_path to open the last opened Photos library.  This usually works but is not 100% reliable.  It can also lead to loading a different library than expected if the user has held down *option* key when opening Photos to switch libraries.  It is therefore recommended you explicitely pass the path to `PhotosDB()`.