diff --git a/src/html_epub_preprocessor.py b/src/html_epub_preprocessor.py
index 1e01690..36cd35b 100644
--- a/src/html_epub_preprocessor.py
+++ b/src/html_epub_preprocessor.py
@@ -72,25 +72,11 @@ def preprocess_table(body_tag: BeautifulSoup):
     tables = body_tag.find_all("table")
     for table in tables:
         tds = table.find_all(re.compile("td|th|tr"))
-
-        border_sizes = []
         for td in tds:
             style = td.get('style')
             width = ''
             if style:
-                border_match = re.search(r"border: ?(\d+\.?\d*)(p[tx])", style) or\
-                               re.search(r"border-top-width: ?(\d+\.?\d*)(p[tx])", style) or\
-                               re.search(r"border-left-width: ?(\d+\.?\d*)(p[tx])", style) or \
-                               re.search(r"border-right-width: ?(\d+\.?\d*)(p[tx])", style) or \
-                               re.search(r"border-bottom-width: ?(\d+\.?\d*)(p[tx])", style)
-
-                if border_match:
-                    size = border_match.group(1)
-                    units = border_match.group(2)
-                    border_sizes.append(float(size))
-
                 width_match = re.search(r"[^-]width: ?(\d+\.?\d*)(p[tx])", style)
-
                 if width_match:
                     size = width_match.group(1)
                     units = width_match.group(2)
@@ -107,10 +93,7 @@ def preprocess_table(body_tag: BeautifulSoup):
             if td.attrs.get('style') == '':
                 del td.attrs['style']
 
-        if border_sizes:
-            border_size = sum(border_sizes) / len(border_sizes)
-            table.attrs['border'] = f'{border_size:.2}'
-        else:
+        if not table.attrs.get('border') or table.attrs.get('border') in ['0', '0px']:
             table.attrs['border'] = '1'