diff --git a/lib/scientist/version.rb b/lib/scientist/version.rb
index 37aa42a..6f44cc0 100644
--- a/lib/scientist/version.rb
+++ b/lib/scientist/version.rb
@@ -1,3 +1,3 @@
 module Scientist
-  VERSION = "1.6.3"
+  VERSION = '1.6.4'
 end