diff --git a/README.md b/README.md
index 02a7bdd..2e98d4a 100644
--- a/README.md
+++ b/README.md
@@ -1,32 +1,19 @@
-# PHP Library Template
-A template repository for PHP libraries.
+# PHP Observer
+PHP Observer is a library for PHP to implement the [observer pattern](https://en.wikipedia.org/wiki/Observer_pattern).
 
 ## Requirements
-* [Bash](https://www.gnu.org/software/bash/)
-* [Git](https://git-scm.com/)
-* [direnv](https://direnv.net/)
-* [Docker](https://www.docker.com/)
+PHP Observer has the following requirements:
 
-## Installation
-```console
-./install.sh library-name
-```
+* PHP >= 7.3
 
-## Development Environment
-Start up my development environment:
-```console
-laradockctl my:up
-```
-
-Shut down my development environment:
+## Installation
+Execute the Composer `require` command:
 ```console
-laradockctl my:down
+composer require ngmy/observer
 ```
 
-And more commands:
-```console
-laradockctl --help
-```
+## Documentation
+Please see the [API documentation](https://ngmy.github.io/php-observer/api/).
 
 ## License
-PHP Library Template is open-sourced software licensed under the [MIT license](http://opensource.org/licenses/MIT).
+PHP Observer is open-sourced software licensed under the [MIT license](http://opensource.org/licenses/MIT).