diff --git a/Cargo.lock b/Cargo.lock
index 84bed47..fc6d53f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -85,7 +85,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "dntk"
-version = "2.1.17"
+version = "2.1.18"
 dependencies = [
  "ansi_term 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "assert_cmd 0.11.1 (registry+https://github.com/rust-lang/crates.io-index)",
diff --git a/Cargo.toml b/Cargo.toml
index 98fc5c9..8bbb008 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "dntk"
-version = "2.1.17"
+version = "2.1.18"
 authors = ["nnao45 <n4sekai5y@gmail.com>"]
 edition = "2018"
 license = "MIT"
diff --git a/README.md b/README.md
index 27e4423..621074c 100644
--- a/README.md
+++ b/README.md
@@ -1,8 +1,8 @@
 # dntk
 [![Travis CI](https://travis-ci.org/nnao45/dntk.svg?branch=master)](https://travis-ci.org/nnao45/dntk)
-[![v2.1.17](https://img.shields.io/badge/package-v2.1.17-ff69b4.svg)](https://github.com/nnao45/dntk/releases/tag/v2.1.17)
-[![crates](https://img.shields.io/badge/crates.io-v2.1.17-319e8c.svg)](https://crates.io/crates/dntk)
-[![docker](https://img.shields.io/badge/docker-v2.1.17-blue.svg)](https://hub.docker.com/r/nnao45/dntk/tags)
+[![v2.1.18](https://img.shields.io/badge/package-v2.1.18-ff69b4.svg)](https://github.com/nnao45/dntk/releases/tag/v2.1.18)
+[![crates](https://img.shields.io/badge/crates.io-v2.1.18-319e8c.svg)](https://crates.io/crates/dntk)
+[![docker](https://img.shields.io/badge/docker-v2.1.18-blue.svg)](https://hub.docker.com/r/nnao45/dntk/tags)
 [![license](http://img.shields.io/badge/license-MIT-red.svg?style=flat)](https://raw.githubusercontent.com/nnao45/dntk/master/LICENSE)
 [![platform](https://img.shields.io/badge/platform-%20osx%20|%20linux%20|%20freebsd%20|%20windows-orange.svg)](https://github.com/nnao45/dntk/releases)
 
@@ -37,7 +37,7 @@ dntk is command line's multi-platform ***Interactive*** calculator, [GNU bc](htt
     </tr>
 </table>
 
-## ***Current dntk's version: v2.1.17***
+## ***Current dntk's version: v2.1.18***
 Download Page: https://github.com/nnao45/dntk/releases/latest
 
 ## Platform
@@ -58,20 +58,20 @@ $ brew install nnao45/dntk/dntk
 
 ### Linux
 ```bash
-$ wget https://github.com/nnao45/dntk/releases/download/v2.1.17/dntk-v2.1.17-x86_64-unknown-linux-musl.zip
-$ unzip dntk-v2.1.17-x86_64-unknown-linux-musl.zip
+$ wget https://github.com/nnao45/dntk/releases/download/v2.1.18/dntk-v2.1.18-x86_64-unknown-linux-musl.zip
+$ unzip dntk-v2.1.18-x86_64-unknown-linux-musl.zip
 ```
 
 ### Windows
 ```bash
-$ wget https://github.com/nnao45/dntk/releases/download/v2.1.17/dntk-v2.1.17-x86_64-pc-windows-msvc.zip
-$ unzip dntk-v2.1.17-x86_64-pc-windows-msvc.zip
+$ wget https://github.com/nnao45/dntk/releases/download/v2.1.18/dntk-v2.1.18-x86_64-pc-windows-msvc.zip
+$ unzip dntk-v2.1.18-x86_64-pc-windows-msvc.zip
 ```
 
 ### FreeBSD
 ```bash
-$ wget https://github.com/nnao45/dntk/releases/download/v2.1.17/dntk-v2.1.17-x86_64-unknown-freebsd.zip
-$ unzip dntk-v2.1.17-x86_64-unknown-freebsd.zip
+$ wget https://github.com/nnao45/dntk/releases/download/v2.1.18/dntk-v2.1.18-x86_64-unknown-freebsd.zip
+$ unzip dntk-v2.1.18-x86_64-unknown-freebsd.zip
 ```
 
 ### Cargo