diff --git a/config/default.yml b/config/default.yml
index e489328a4184..faa2b918a132 100644
--- a/config/default.yml
+++ b/config/default.yml
@@ -156,6 +156,8 @@ AllCops:
     rubocop-capybara: [capybara]
   # Enable/Disable checking the methods extended by Active Support.
   ActiveSupportExtensionsEnabled: false
+  # Used by rubocop-rails to set the version of Rails used by the inspected code
+  TargetRailsVersion: ~
 
 #################### Bundler ###############################