diff --git a/README.md b/README.md
index 69b732c..53ae0b3 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,20 @@
 # docker-tags
 
-list all tags for a Docker image on a remote registry.
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+List all tags for a Docker image on a remote registry.
+
+## Usage
+
+Build and install binaries into `/${CARGO_HOME}/bin` by default.
+
+```
+cargo install --path . --locked
+```
+
+> Cargo install ignores Cargo.lock by default.
+> Use `--locked` to match `cargo build --release` would build.
+
+Change the location by `--root` option.
+
+```
+cargo install --path --locked --root /usr/local 
+```
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