diff --git a/README.md b/README.md
index 3b9a7e9..a9d2533 100644
--- a/README.md
+++ b/README.md
@@ -17,15 +17,34 @@
 
  [^1]: We should note that NGINX doesn't guarantee such a consistency by default. To this end, you have to add `if` statement in the configuration file in NGINX.
 
-## Making an executable binary
+## Installing/Building an executable binary of `rpxy`
+
+<!-- ### From `crates.io`
+
+The simplest way is to install from [`crates.io`](https://crates.io/crates/rpxy) as follows.
 
 ```:bash
+% cargo install rpxy
+```
+
+Then you have an executive binary `~/.cargo/bin/rpxy`.
+
+Alternatively, y -->
+You can build an executable binary yourself by checking out this Git repository.
+
+```:bash
+# Cloning the git repository
+% git clone https://github.com/junkurihara/rust-rpxy
+% cde rust-rpxy
+
+# Update submodule hyperium/h3
+% git submodule update --init
+
+# Build
 % cargo build --release
 ```
 
-Then you have a binary at `./target/release/rpxy`.
-
-You can also use [`docker` image](https://hub.docker.com/r/jqtype/rpxy) instead of building from the source.
+Then you have an executive binary `rust-rpxy/target/release/rpxy`.
 
 ## Usage
 
@@ -37,4 +56,7 @@ todo!
 
 ## Using `docker` image
 
+You can also use [`docker` image](https://hub.docker.com/r/jqtype/rpxy) instead of directly executing the binary.
+
+
 todo!
diff --git a/TODO.md b/TODO.md
index b8d4087..907aba2 100644
--- a/TODO.md
+++ b/TODO.md
@@ -5,4 +5,5 @@
 - Smaller footprint of docker image using musl
 - Refactoring
 - Options to serve custom http_error page.
+- Prometheus metrics
 - etc.