diff --git a/src/html_epub_preprocessor.py b/src/html_epub_preprocessor.py
index f073cdc..d486d43 100644
--- a/src/html_epub_preprocessor.py
+++ b/src/html_epub_preprocessor.py
@@ -1,7 +1,6 @@
 import os
 import pathlib
 import re
-from html import escape
 from typing import List, Tuple
 
 from bs4 import BeautifulSoup, NavigableString, Tag
@@ -379,7 +378,7 @@ def get_tags_between_chapter_marks(first_id, href, html_soup):
 
 def wrap_preformatted_span_with_table(main_tag, old_tag):
     table = main_tag.new_tag("table")
-    table.attrs['border'] = '1px solid #ccc;'
+    table.attrs['border'] = '1px #ccc;'
     table.attrs['style'] = 'width:100%;'
     tbody = main_tag.new_tag("tbody")
     tr = main_tag.new_tag("tr")
@@ -393,7 +392,7 @@ def wrap_preformatted_span_with_table(main_tag, old_tag):
     return table
 
 
-def wrap_block_tag_with_table(main_tag, old_tag, width='95', border='1px solid', bg_color=None):
+def wrap_block_tag_with_table(main_tag, old_tag, width='95', border='1px', bg_color=None):
     table = main_tag.new_tag("table")
     table.attrs['border'] = border
     table.attrs['align'] = 'center'