README.md in mem-0.1.5 vs README.md in mem-0.2.0

@@ -1,8 +1,20 @@
 # Mem
-Memoize any method call.
 
+[![CI](https://github.com/r7kamura/mem/actions/workflows/ci.yml/badge.svg)](https://github.com/r7kamura/mem/actions/workflows/ci.yml)
+
+Memoize method calls.
+
 ## Installation
+
+Install the gem and add to the application's Gemfile by executing:
+
+```
+bundle add mem
+```
+
+If bundler is not being used to manage dependencies, install the gem by executing:
+
 ```
 gem install mem
 ```
 
 ## Usage