diff --git a/docs/source/conf.py b/docs/source/conf.py
index 3532a76..6f66993 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -48,9 +48,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = '1.6.3'
+version = '1.6.4'
 # The full version, including alpha/beta/rc tags.
-release = '1.6.3'
+release = '1.6.4'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/mailqueue/__init__.py b/mailqueue/__init__.py
index 0a31a01..eea967b 100644
--- a/mailqueue/__init__.py
+++ b/mailqueue/__init__.py
@@ -1 +1 @@
-VERSION = '1.6.3'
\ No newline at end of file
+VERSION = '1.6.4'