diff --git a/Project.toml b/Project.toml
index 6af0858..255eece 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 = "0.3.39"
+version = "0.3.40"
 
 [deps]
 Compat = "34da2185-b29b-5c13-b0c7-acf172513d20"