diff --git a/postmarker/__init__.py b/postmarker/__init__.py
index 3613d17..02590bc 100644
--- a/postmarker/__init__.py
+++ b/postmarker/__init__.py
@@ -1,4 +1,4 @@
 # coding: utf-8
 
 
-__version__ = '0.5.1'
+__version__ = '0.5.2'