diff --git a/cleanerupper/plugin.py b/cleanerupper/plugin.py
index 3d172f8..5ffb558 100644
--- a/cleanerupper/plugin.py
+++ b/cleanerupper/plugin.py
@@ -199,6 +199,7 @@ def remove_unwanted_classes_ids(soup):
         r'c\d+',
         r'calibre_?\d*',
         r'calibre_pb_\d+',
+        r'calibreclass\d*',
         r'chapter',
         r'div\d+',
         r'dropcaps',
@@ -374,6 +375,7 @@ def replace_classes_real_tags(soup):
         'span.small1': 'small',
         'span.smallcaps': 'small',
         'span.smallCaps': 'small',
+        'span.smallCaps1': 'small',
         'span.strike': 'strike',
         'span.under': 'u',
         'span.underline': 'u',