diff --git a/src/model.py b/src/model.py
index 1a1ab55..fdd803f 100644
--- a/src/model.py
+++ b/src/model.py
@@ -18,8 +18,8 @@ class Song:
         self.verses = []
         self.name = name.replace("\\\\", "-").replace("\\", "")
         self.number = number
-        self.author = author.replace("\\", "")
-        self.origin = origin.replace("\\", "")
+        self.author = author.replace("\\", "") if author else author
+        self.origin = origin.replace("\\", "") if origin else origin
         self.latex_file = latex_file
         self.audios = audios
         self.capo = capo