diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index b22e20d..26a056a 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -273,13 +273,10 @@ Style/SignalException:
     - 'lib/airbrake_api/v3/notice_parser.rb'
     - 'lib/hoptoad.rb'
 
-# Offense count: 4
+# Offense count: 1
 # Configuration parameters: Methods.
 Style/SingleLineBlockParams:
   Exclude:
-    - 'app/helpers/application_helper.rb'
-    - 'app/helpers/form_helper.rb'
-    - 'app/models/notice_fingerprinter.rb'
     - 'lib/hoptoad/v2.rb'
 
 # Offense count: 11
diff --git a/app/helpers/form_helper.rb b/app/helpers/form_helper.rb
index d0784b3..66aadc8 100644
--- a/app/helpers/form_helper.rb
+++ b/app/helpers/form_helper.rb
@@ -5,7 +5,9 @@ module FormHelper
     content_tag(:div, :class => 'error-messages') do
       body = content_tag(:h2, 'Dang. The following errors are keeping this from being a success.')
       body + content_tag(:ul) do
-        document.errors.full_messages.inject('') {|errs, msg| errs + content_tag(:li, h(msg)) }.html_safe
+        document.errors.full_messages.inject('') do |errs, msg|
+          errs + content_tag(:li, h(msg))
+        end.html_safe
       end
     end
   end
diff --git a/app/models/notice_fingerprinter.rb b/app/models/notice_fingerprinter.rb
index 0bdc7c9..34fe17c 100644
--- a/app/models/notice_fingerprinter.rb
+++ b/app/models/notice_fingerprinter.rb
@@ -27,6 +27,6 @@ class NoticeFingerprinter
       material << backtrace.lines.slice(0, backtrace_lines)
     end
 
-    Digest::MD5.hexdigest(material.reduce('') { |c, m| c << m.to_s; c })
+    Digest::MD5.hexdigest(material.map(&:to_s).join)
   end
 end
--
libgit2 0.21.2