diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index ce0c7e3..a0c424c 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Change Log
 
+## Unreleased Changes
+
+Release Date: TBD
+
 ## Version 0.5.1
 
 Release date: 2023-07-07
diff --git a/smtpdfix/__init__.py b/smtpdfix/__init__.py
index 675a516..ca5116a 100644
--- a/smtpdfix/__init__.py
+++ b/smtpdfix/__init__.py
@@ -6,7 +6,7 @@
     "smtpd",
     "SMTPDFix",
 )
-__version__ = "0.5.1"
+__version__ = "0.5.2a1"
 
 from .authenticator import Authenticator
 from .configuration import Config