diff --git a/Rakefile.rb b/Rakefile.rb
index cec8352..cc4db50 100644
--- a/Rakefile.rb
+++ b/Rakefile.rb
@@ -7,7 +7,7 @@ require "yaml"
 ##
 # Rake tasks
 load "rake/tasks/deploy.rake"
-load "rake/tasks/linter.rake"
+load "rake/tasks/format.rake"
 load "rake/tasks/nanoc.rake"
 load "rake/tasks/submodules.rake"
 
@@ -16,11 +16,11 @@ task :server, [:protocol] do |_t, args|
   require "server"
   nanoc = Ryo.from(YAML.load_file("./nanoc.yaml"))
   h = args.to_h
-  o = if h[:protocol] == 'unix'
-        {unix: nanoc.server.unix.path}
-      else
-        {host: nanoc.server.tcp.host, port: nanoc.server.tcp.port}
-      end
+  o = if h[:protocol] == "unix"
+    {unix: nanoc.server.unix.path}
+  else
+    {host: nanoc.server.tcp.host, port: nanoc.server.tcp.port}
+  end
   s = Server.dir(nanoc.output_dir, o)
   s.start(block: true)
 rescue Interrupt
diff --git a/Rules b/Rules
index ec87c4a..37ec56b 100644
--- a/Rules
+++ b/Rules
@@ -43,7 +43,7 @@ end
 # /sitemap.xml
 compile "/sitemap.xml.erb" do
   filter(:erb, locals: {locales:, name_by_id:})
-  filter Proc.new { _1.each_line.reject { |s| s.strip.empty? }.join }
+  filter proc { _1.each_line.reject { |s| s.strip.empty? }.join }
   write("/sitemap.xml")
 end
 
diff --git a/nanoc/lib/mixin.rb b/nanoc/lib/mixin.rb
index 2551a8a..1647438 100644
--- a/nanoc/lib/mixin.rb
+++ b/nanoc/lib/mixin.rb
@@ -9,7 +9,7 @@ module Mixin
   def app_version
     @app_version ||= begin
       ver = File.read File.join(Dir.getwd, "VERSION")
-      ver.gsub(/[^\d.]/, '')
+      ver.gsub(/[^\d.]/, "")
     end
   end
 
diff --git a/nanoc/lib/nanoc/ruledsl/filter.rb b/nanoc/lib/nanoc/ruledsl/filter.rb
index 8e0e124..5cb9c93 100644
--- a/nanoc/lib/nanoc/ruledsl/filter.rb
+++ b/nanoc/lib/nanoc/ruledsl/filter.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Nanoc::RuleDSL
   module Filter
     ##
@@ -28,9 +30,9 @@ module Nanoc::RuleDSL
     private
 
     def random_id
-      name = item.identifier.to_s.gsub(%r|[./\\]|, "_")[/[A-Za-z0-9_]+/]
+      name = item.identifier.to_s.gsub(%r{[./\\]}, "_")[/[A-Za-z0-9_]+/]
       random = SecureRandom.alphanumeric
-      "__nanoc_#{name}_#{random}".to_sym
+      :"__nanoc_#{name}_#{random}"
     end
   end
 end
diff --git a/nanoc/lib/nanoc/ruledsl/require_rules.rb b/nanoc/lib/nanoc/ruledsl/require_rules.rb
index f82965a..5880ceb 100644
--- a/nanoc/lib/nanoc/ruledsl/require_rules.rb
+++ b/nanoc/lib/nanoc/ruledsl/require_rules.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Nanoc::RuleDSL
   module RequireRules
     ##
diff --git a/rake/tasks/linter.rake b/rake/tasks/format.rake
similarity index 73%
rename from rake/tasks/linter.rake
rename to rake/tasks/format.rake
index cbbf1fb..7887f95 100644
--- a/rake/tasks/linter.rake
+++ b/rake/tasks/format.rake
@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-namespace :linter do
+namespace :format do
   desc "Run rubocop (Ruby)"
   task :rubocop do
     sh "bundle exec rubocop -A"
@@ -17,5 +17,5 @@ namespace :linter do
   end
 end
 
-desc "Run all linters"
-task linter: ["linter:rubocop", "linter:eslint", "linter:prettier"]
+desc "Run all formats"
+task format: ["format:rubocop", "format:eslint", "format:prettier"]
diff --git a/src/js/components/Timer.tsx b/src/js/components/Timer.tsx
index 32f6e9e..ab360d6 100644
--- a/src/js/components/Timer.tsx
+++ b/src/js/components/Timer.tsx
@@ -1,5 +1,5 @@
 import React, { useEffect } from "react";
-import type { Surah, Ayah, TLocale, TAyat } from "Quran";
+import type { Surah, Ayah, TLocale } from "Quran";
 import { formatNumber } from "~/lib/t";
 
 type Maybe<T> = T | null | undefined;