diff --git a/Cargo.toml b/Cargo.toml
index 7011e55..0531c16 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "toda"
-version = "0.1.19"
+version = "0.1.20"
 authors = ["Yang Keao <keao.yang@yahoo.com>"]
 edition = "2018"