README.md in goodcheck-1.5.0 vs README.md in goodcheck-1.5.1

@@ -20,10 +20,10 @@
 $ gem install goodcheck
 ```
 
 Or you can use `bundler`!
 
-If you would not like to install Goodcheck to system (e.g. you would not like to install Ruby 2.4 or higher), you can use a docker image. [See below](#docker-image).
+If you would not like to install Goodcheck to system (e.g. you would not like to install Ruby 2.4 or higher), you can use a docker image. [See below](#docker-images).
 
 ## Quickstart
 
 ```bash
 $ goodcheck init