diff --git a/README.md b/README.md
index db38bc7..86338e6 100644
--- a/README.md
+++ b/README.md
@@ -19,6 +19,9 @@ You need to have Rust and Nmap installed in your computer, then run:
 # extract it and continue to next step.
 2. cargo build --release
 # Now the binary is in ./target/release/unimap
+# The next command only works on Linux and MacOS. Windows user need specify the target path in environment variable
+3. cp ./target/release/unimap /usr/local/bin
+# Now you can use the `unimap` command from everyewhere.
 ```
 
 ## Using precompiled binaries