diff --git a/src/diff_shades/__init__.py b/src/diff_shades/__init__.py
index be3dc21..6c26007 100644
--- a/src/diff_shades/__init__.py
+++ b/src/diff_shades/__init__.py
@@ -4,4 +4,4 @@
 
 __author__ = "Richard Si, et al."
 __license__ = "MIT"
-__version__ = "21.12a4"
+__version__ = "21.12a5"