diff --git a/README.md b/README.md
index 954b6f5..99e8d49 100644
--- a/README.md
+++ b/README.md
@@ -85,17 +85,6 @@ curl https://raw.githubusercontent.com/stepchowfun/docuum/main/install.sh -LSfs
 
 The same command can be used again to update to the latest version.
 
-The installation script supports the following optional environment variables:
-
-- `VERSION=x.y.z` (defaults to the latest version)
-- `PREFIX=/path/to/install` (defaults to `/usr/local/bin`)
-
-For example, the following will install Docuum into the working directory:
-
-```sh
-curl https://raw.githubusercontent.com/stepchowfun/docuum/main/install.sh -LSfs | PREFIX=. sh
-```
-
 If you prefer not to use this installation method, you can download the binary from the [latest release](https://github.com/stepchowfun/docuum/releases/latest), make it executable (e.g., with `chmod`), and place it in some directory in your [`PATH`](https://en.wikipedia.org/wiki/PATH_\(variable\)) (e.g., `/usr/local/bin`).
 
 #### Installation on Windows (AArch64 or x86-64)