diff --git a/Cargo.lock b/Cargo.lock
index 9316702..f8669f8 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -66,7 +66,7 @@ dependencies = [
 
 [[package]]
 name = "upt"
-version = "0.4.0"
+version = "0.5.0"
 dependencies = [
  "which",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 615f403..df0fcf2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "upt"
-version = "0.4.0"
+version = "0.5.0"
 edition = "2021"
 authors = ["sigoden <sigoden@gmail.com>"]
 description = "Universal package management tool for any OS"
diff --git a/README.md b/README.md
index 4abaaa4..e5ec4a6 100644
--- a/README.md
+++ b/README.md
@@ -153,7 +153,6 @@ You can specify the package manager that UPT should use by setting the `UPT_TOOL
 
 ```sh
 UPT_TOOL=snap upt install $pkg             # run snap to install $pkg
-UPT_TOOL=nix-env upt install $pkg          # run nix-env to install $pkg
 ```
 
 ## License