diff --git a/kindlecomicconverter/comic2ebook.py b/kindlecomicconverter/comic2ebook.py
index 6598d71..fb1c77c 100755
--- a/kindlecomicconverter/comic2ebook.py
+++ b/kindlecomicconverter/comic2ebook.py
@@ -911,7 +911,6 @@ def createNewTome():
 
 def slugify(value):
     value = slugify_ext(value, regex_pattern=r'[^-a-z0-9_\.]+').strip('.')
-    value = sub(r'0*([0-9]{4,})', r'\1', sub(r'([0-9]+)', r'0000\1', value, count=2))
     return value