diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 9c480cc5a..95ef3ba6b 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -653,15 +653,6 @@ Layout/SpaceInsidePercentLiteralDelimiters:
   Exclude:
     - 'app/models/activity.rb'
 
-# Offense count: 2
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles.
-# SupportedStyles: single_quotes, double_quotes
-Style/StringLiteralsInInterpolation:
-  Exclude:
-    - 'app/controllers/stats_controller.rb'
-    - 'app/models/proposal.rb'
-
 # Offense count: 9
 # Cop supports --auto-correct.
 # Configuration parameters: IgnoredMethods.
diff --git a/app/controllers/stats_controller.rb b/app/controllers/stats_controller.rb
index ab6bedd6e..cd2efac6b 100644
--- a/app/controllers/stats_controller.rb
+++ b/app/controllers/stats_controller.rb
@@ -23,6 +23,6 @@ class StatsController < ApplicationController
   private
 
     def daily_cache(key, &block)
-      Rails.cache.fetch("public_stats/#{Time.current.strftime("%Y-%m-%d")}/#{key}", &block)
+      Rails.cache.fetch("public_stats/#{Time.current.strftime('%Y-%m-%d')}/#{key}", &block)
     end
 end
diff --git a/app/models/proposal.rb b/app/models/proposal.rb
index f37dff3d5..a35b29459 100644
--- a/app/models/proposal.rb
+++ b/app/models/proposal.rb
@@ -128,7 +128,7 @@ class Proposal < ActiveRecord::Base
   end
 
   def code
-    "#{Setting["proposal_code_prefix"]}-#{created_at.strftime('%Y-%m')}-#{id}"
+    "#{Setting['proposal_code_prefix']}-#{created_at.strftime('%Y-%m')}-#{id}"
   end
 
   def after_commented