diff --git a/Project.toml b/Project.toml
index 7ffc4fc..3e696ff 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "BangBang"
 uuid = "198e06fe-97b7-11e9-32a5-e1d131e6ad66"
 authors = ["Takafumi Arakaki <aka.tkf@gmail.com>"]
-version = "0.4.1"
+version = "0.4.2"
 
 [deps]
 Accessors = "7d9f7c33-5ae7-4f3b-8dc6-eff91059b697"