diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 2d04a06c..347c5dd9 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -194,7 +194,7 @@ bundle exec rake bin/rails db:migrate RAILS_ENV=test
 ```
 
 ### Run the specs
-```
+```  bash
 # update your apps gemfile to point at the local version of the gem. e.g.:
 gem 'bulkrax', path: 'vendor/bulkrax'