diff --git a/Cargo.toml b/Cargo.toml
index e19cda31..8e1b7674 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "hayabusa"
-version = "1.5.1"
+version = "1.6.0-dev"
 authors = ["Yamato Security @SecurityYamato"]
 edition = "2021"