diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7e888fb0b..b0c7140d8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 ## next release
 
 - Fix a bug: fix all failing tasks of rake task file chain.rake
+- Fix a bug: file_size_validator.rb was broken since ruby v3, see https://github.com/rails/rails/issues/41270
 
 ## v6.2.0 2023 October 13
 
diff --git a/lib/file_size_validator.rb b/lib/file_size_validator.rb
index 328e56f93..526ba1268 100644
--- a/lib/file_size_validator.rb
+++ b/lib/file_size_validator.rb
@@ -52,7 +52,7 @@ class FileSizeValidator < ActiveModel::EachValidator
       default_message = options[MESSAGES[key]]
       errors_options[:message] ||= default_message if default_message
 
-      record.errors.add(attribute, MESSAGES[key], errors_options)
+      record.errors.add(attribute, MESSAGES[key], **errors_options)
     end
   end