README.md in jets_gem_layer-1.0.2 vs README.md in jets_gem_layer-1.0.3

- old
+ new

@@ -44,10 +44,11 @@
 4. Add the gem's initializer to your Rakefile
 ```ruby
 # Rakefile
 
 require 'jets'
+require 'jets_gem_layer'
 require_relative 'config/application'
 
 Jets.application.load_tasks
 JetsGemLayer.load_tasks
 ```
@@ -79,8 +80,11 @@
    * If needed, builds and publishes a new gem layer version based on the current Jets namespace, Gemfile.lock and Gemfile
 2. `JETS_ENV=development JETS_AGREE=no jets deploy`
    * Deploy your application
 3. `JETS_ENV=development rake gem_layer:cleanup_published`
    * After a successful deploy, you may run this to cleanup the old gem layer version(s) no longer in use
+
+**Important:** The zip command must be installed in your environment or the layer will fail to zip and upload. Perhaps we will
+switch to rubyzip in the future.
 
 ## Acknowledgements
 A big thank you to the authors of [Lambda Layer Cake](https://github.com/loganb/lambda-layer-cake), which served as a reference.
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