[DSL] Suggest updating bundler on invalid optionsseg-unknown-keys

1 files changed, 2 insertions, 1 deletions

diff --git a/lib/bundler/dsl.rb b/lib/bundler/dsl.rb
index b064c80d4c..428ccd4c2d 100644
--- a/lib/bundler/dsl.rb
+++ b/lib/bundler/dsl.rb
@@ -393,7 +393,8 @@ module Bundler
                      "as an option for #{command}, but it is invalid."
                    end
 
-        message << " Valid options are: #{valid_keys.join(", ")}"
+        message << " Valid options are: #{valid_keys.join(", ")}."
+        message << " You may be able to resolve this by upgrading Bundler to the newest version."
         raise InvalidOption, message
       end
     end