diff --git a/src/chronos/__about__.py b/src/chronos/__about__.py
index 9724440d..f6229828 100644
--- a/src/chronos/__about__.py
+++ b/src/chronos/__about__.py
@@ -1 +1 @@
-__version__ = "2.2.0rc3"
+__version__ = "2.2.0rc4"