diff --git a/lib/departure.rb b/lib/departure.rb
index f2e38bf1..9f08bb66 100644
--- a/lib/departure.rb
+++ b/lib/departure.rb
@@ -28,7 +28,7 @@
 end
 
 module Departure
-  SUPPORTED_ADAPTERS = %i[trilogy mysql2].freeze
+  SUPPORTED_ADAPTERS = %w[trilogy mysql2].freeze
 
   class << self
     attr_accessor :configuration