diff --git a/.rubocop.yml b/.rubocop.yml
index 171999072..219a99574 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -517,6 +517,9 @@ Style/RedundantSelf:
 Style/SafeNavigation:
   Enabled: true
 
+Style/SingleLineMethods:
+  Enabled: true
+
 Style/SoleNestedConditional:
   Enabled: true
 
diff --git a/config/sitemap.rb b/config/sitemap.rb
index 8886fd7b3..24b0e8ce3 100644
--- a/config/sitemap.rb
+++ b/config/sitemap.rb
@@ -1,6 +1,9 @@
 # not use compression
 class SitemapGenerator::FileAdapter
-  def gzip(stream, data); stream.write(data); stream.close end
+  def gzip(stream, data)
+    stream.write(data)
+    stream.close
+  end
 end
 SitemapGenerator::Sitemap.namer = SitemapGenerator::SimpleNamer.new(:sitemap, extension: ".xml")