diff --git a/.rubocop.yml b/.rubocop.yml
index ca24832..0c20198 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,3 +1,5 @@
+require: rubocop-performance
+
 AllCops:
   AllowSymlinksInCacheRootDirectory: true
   DisplayCopNames: true
diff --git a/app/lib/cucumber_feed/feed_renderer.rb b/app/lib/cucumber_feed/feed_renderer.rb
index b95104f..56415ff 100644
--- a/app/lib/cucumber_feed/feed_renderer.rb
+++ b/app/lib/cucumber_feed/feed_renderer.rb
@@ -135,7 +135,7 @@ def parse_url(href)
       unless url.absolute?
         local_url = url
         url = Ginseng::URI.parse(self.url)
-        if href.to_s =~ %r{^/}
+        if %r{^/}.match?(href.to_s)
           url.path = local_url.path
         else
           url.path = File.join(url.path, local_url.path)
diff --git a/config/application.yaml b/config/application.yaml
index 560f6f2..a76ef4b 100644
--- a/config/application.yaml
+++ b/config/application.yaml
@@ -1,5 +1,5 @@
 package:
-  version: 1.3.15
+  version: 1.3.16
   url: https://github.com/pooza/cucumber-feed
   authors:
     - Tatsuya Koishi