diff --git a/Cargo.toml b/Cargo.toml
index c340785..ab8e30e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "kittysay"
-version = "0.3.0"
+version = "0.4.0"
 authors = ["uncenter <uncenter@uncenter.dev>"]
 license = "MIT"
 description = "The cutest successor of cowsay."
diff --git a/README.md b/README.md
index 98231df..2b829c1 100644
--- a/README.md
+++ b/README.md
@@ -31,7 +31,7 @@ cargo install --git https://github.com/uncenter/kittysay.git
 #### Try it out
 
 ```sh
-nix run github:uncenter/kittysay/v0.3.0 ":3"
+nix run github:uncenter/kittysay/v0.4.0 ":3"
 # or for the latest commit
 nix run github:uncenter/kittysay -- ":3"
 ```