diff --git a/varken/__init__.py b/varken/__init__.py
index 196ac44..4847e96 100644
--- a/varken/__init__.py
+++ b/varken/__init__.py
@@ -1,2 +1,2 @@
-VERSION = "1.6.3"
-BRANCH = 'master'
+VERSION = "1.6.4"
+BRANCH = 'nightly'