Bump the version number for the standalone mimelib package.
diff --git a/Lib/email/__init__.py b/Lib/email/__init__.py
index b5d8d72..bfd6105 100644
--- a/Lib/email/__init__.py
+++ b/Lib/email/__init__.py
@@ -4,7 +4,7 @@
 """A package for parsing, handling, and generating email messages.
 """
 
-__version__ = '2.5.3'
+__version__ = '2.5.4'
 
 __all__ = [
     'base64MIME',