diff --git a/changelog/fix_incorrect_documentation_urls.md b/changelog/fix_incorrect_documentation_urls.md
new file mode 100644
index 0000000000..03d9d256f4
--- /dev/null
+++ b/changelog/fix_incorrect_documentation_urls.md
@@ -0,0 +1 @@
+* [#756](https://github.com/rubocop/rubocop-rails/pull/756): Fix incorrect documentation URLs when using `rubocop --show-docs-url`. ([@r7kamura][])
diff --git a/config/default.yml b/config/default.yml
index fc34cc8a79..284b45cb11 100644
--- a/config/default.yml
+++ b/config/default.yml
@@ -61,6 +61,10 @@ Lint/NumberConversion:
     - fortnights
     - in_milliseconds
 
+Rails:
+  Enabled: true
+  DocumentationBaseURL: https://docs.rubocop.org/rubocop-rails
+
 Rails/ActionControllerTestCase:
   Description: 'Use `ActionDispatch::IntegrationTest` instead of `ActionController::TestCase`.'
   StyleGuide: 'https://rails.rubystyle.guide/#integration-testing'