diff --git a/DeDRM_plugin/__init__.py b/DeDRM_plugin/__init__.py
index 3b1e151..cdbd4a9 100644
--- a/DeDRM_plugin/__init__.py
+++ b/DeDRM_plugin/__init__.py
@@ -69,6 +69,7 @@ __docformat__ = 'restructuredtext en'
 #   6.6.3 - More cleanup of kindle book names and start of support for .kinf2018
 #   6.7.0 - Handle new library in calibre.
 #   6.8.0 - Full support for .kinf2018 and new KFX encryption (Kindle for PC/Mac 2.5+)
+#   6.8.1 - Kindle key fix for Mac OS X Big Syr
 #   7.0.0 - Switched to Python 3 for calibre 5.0. Thanks to all who comtibuted
 
 """
diff --git a/DeDRM_plugin/kindlekey.py b/DeDRM_plugin/kindlekey.py
index 73425f8..35baa46 100644
--- a/DeDRM_plugin/kindlekey.py
+++ b/DeDRM_plugin/kindlekey.py
@@ -28,6 +28,7 @@ __version__ = '3.0'
 #  2.5   - Final Fix for Windows user names with non-ascii characters, thanks to oneofusoneofus
 #  2.6   - Start adding support for Kindle 1.25+ .kinf2018 file
 #  2.7   - Finish .kinf2018 support, PC & Mac by Apprentice Sakuya
+#  2.8   - Fix for Mac OS X Big Sur
 #  3.0   - Python 3 for calibre 5.0