diff --git a/Rails.gitignore b/Rails.gitignore
index 828ab1d556ad0f0dde9ad559f70ce3a5095e7737..e62f78e17bcb78d57f4b10850480c98326dc7963 100644
--- a/Rails.gitignore
+++ b/Rails.gitignore
@@ -14,6 +14,7 @@ pickle-email-*.html
 
 # TODO Comment out this rule if you are OK with secrets being uploaded to the repo
 config/initializers/secret_token.rb
+config/master.key
 
 # Only include if you have production secrets in this file, which is no longer a Rails default
 # config/secrets.yml