diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 910c70613..ba2e44d10 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -223,15 +223,6 @@ Layout/SpaceInsideBlockBraces:
     - 'test/lib/generators/devise_token_auth/install_generator_test.rb'
 
 
-# Offense count: 5
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle.
-# SupportedStyles: space, no_space
-Layout/SpaceInsideStringInterpolation:
-  Exclude:
-    - 'lib/devise_token_auth/controllers/helpers.rb'
-    - 'lib/generators/devise_token_auth/install_generator.rb'
-
 # Offense count: 4
 # Cop supports --auto-correct.
 # Configuration parameters: EnforcedStyle.
diff --git a/lib/devise_token_auth/controllers/helpers.rb b/lib/devise_token_auth/controllers/helpers.rb
index 3f96880e1..3cc61801b 100644
--- a/lib/devise_token_auth/controllers/helpers.rb
+++ b/lib/devise_token_auth/controllers/helpers.rb
@@ -27,7 +27,7 @@ module ClassMethods
         #     current_blogger :user                             # Preferably returns a User if one is signed in
         #
         def devise_token_auth_group(group_name, opts={})
-          mappings = "[#{ opts[:contains].map { |m| ":#{m}" }.join(',') }]"
+          mappings = "[#{opts[:contains].map { |m| ":#{m}" }.join(',')}]"
 
           class_eval <<-METHODS, __FILE__, __LINE__ + 1
             def authenticate_#{group_name}!(favourite=nil, opts={})
diff --git a/lib/generators/devise_token_auth/install_generator.rb b/lib/generators/devise_token_auth/install_generator.rb
index 878f1062d..73ec06e1f 100644
--- a/lib/generators/devise_token_auth/install_generator.rb
+++ b/lib/generators/devise_token_auth/install_generator.rb
@@ -12,24 +12,24 @@ def create_initializer_file
     end
 
     def copy_migrations
-      if self.class.migration_exists?('db/migrate', "devise_token_auth_create_#{ user_class.underscore }")
-        say_status('skipped', "Migration 'devise_token_auth_create_#{ user_class.underscore }' already exists")
+      if self.class.migration_exists?('db/migrate', "devise_token_auth_create_#{user_class.underscore}")
+        say_status('skipped', "Migration 'devise_token_auth_create_#{user_class.underscore}' already exists")
       else
         migration_template(
           'devise_token_auth_create_users.rb.erb',
-          "db/migrate/devise_token_auth_create_#{ user_class.pluralize.underscore }.rb"
+          "db/migrate/devise_token_auth_create_#{user_class.pluralize.underscore}.rb"
         )
       end
     end
 
     def create_user_model
-      fname = "app/models/#{ user_class.underscore }.rb"
+      fname = "app/models/#{user_class.underscore}.rb"
       unless File.exist?(File.join(destination_root, fname))
         template('user.rb.erb', fname)
       else
         inclusion = 'include DeviseTokenAuth::Concerns::User'
         unless parse_file_for_line(fname, inclusion)
-          
+
           active_record_needle = (Rails::VERSION::MAJOR == 5) ? 'ApplicationRecord' : 'ActiveRecord::Base'
           inject_into_file fname, after: "class #{user_class} < #{active_record_needle}\n" do <<-'RUBY'
   # Include default devise modules.