diff --git a/Gemfile b/Gemfile
index ba47789..acfb954 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,7 +1,7 @@
 source "https://rubygems.org"
 
 gem "sinatra"
-gem 'sinatra-contrib'
+gem "sinatra-contrib"
 gem "puma"
 gem "rackup"
 
@@ -11,7 +11,7 @@ gem "nanoid"
 gem "ulid"
 gem "uuid7"
 
-gem 'jwt'
+gem "jwt"
 
 group :development do
   gem "ruby-lsp"
diff --git a/app.rb b/app.rb
index 408260f..b9bce59 100644
--- a/app.rb
+++ b/app.rb
@@ -15,7 +15,7 @@ require "jwt"
 
 SESSION_SECRET_HEX_LENGTH = 64
 
-set :session_secret, ENV.fetch('SESSION_SECRET') { SecureRandom.hex(SESSION_SECRET_HEX_LENGTH) }
+set :session_secret, ENV.fetch("SESSION_SECRET") { SecureRandom.hex(SESSION_SECRET_HEX_LENGTH) }
 
 CLK_TCK = 100
 PID_FILE_PATH = "/run/app/pid".freeze
@@ -35,7 +35,7 @@ DURATION_PARTS = [
   [SECONDS_PER_DAY, "day", "d"],
   [SECONDS_PER_HOUR, "hour", "h"],
   [SECONDS_PER_MINUTE, "minute", "m"],
-  [1, "second", "s"],
+  [1, "second", "s"]
 ].freeze
 
 JWT_SECRET = SecureRandom.bytes(64).freeze
@@ -44,8 +44,8 @@ module Sinatra
   module RequestHeadersHelper
     def req_headers
       hash = request.env.select { |k, _| k.start_with? "HTTP_" }
-                    .collect { |k, v| [k.gsub(/^HTTP_/, "").gsub(/_/, "-").downcase, v] }
-                    .sort
+        .collect { |k, v| [k.gsub(/^HTTP_/, "").tr("_", "-").downcase, v] }
+        .sort
       h = Rack::Headers.new
       h.merge hash
     end
@@ -90,7 +90,7 @@ module UpDown
   def to_json(*_args)
     return unless enabled?
 
-    JSON.generate({ "status" => "ok" })
+    JSON.generate({"status" => "ok"})
   end
 end
 
@@ -203,7 +203,7 @@ end
 
 before do
   # content_type 'text/plain'
-  sleep(1) while Sleep.instance.asleep? unless request.path_info == "/livez/sleep"
+  sleep(1) while Sleep.instance.asleep? && request.path_info != "/livez/sleep"
 end
 
 get "/" do
@@ -249,7 +249,7 @@ end
 
 get "/livez/uptime" do
   tt = TickTock.new
-  x = { started_at: tt.started_at, seconds: tt.uptime.to_i, human: human_time(tt.uptime.to_i) }
+  x = {started_at: tt.started_at, seconds: tt.uptime.to_i, human: human_time(tt.uptime.to_i)}
   json x
 end
 
@@ -304,16 +304,15 @@ post "/halt" do
 end
 
 get "/pid" do
-  JSON.generate({ puma: master_pid, pid: Process.pid })
+  JSON.generate({puma: master_pid, pid: Process.pid})
 end
 
 get "/token" do
   exp = Time.now.to_i + SECONDS_PER_MINUTE * 2
-  payload = { name: "anonymous", exp: exp, jti: Random.uuid }
+  payload = {name: "anonymous", exp: exp, jti: Random.uuid}
   expires_at = Time.at(exp).to_datetime
   token = JWT.encode payload, JWT_SECRET, "HS256"
-  token
-  x = { :token => token, :expires_at => expires_at }
+  x = {token: token, expires_at: expires_at}
   json x
 end
 
@@ -330,7 +329,7 @@ end
 
 get "/session" do
   j = session.to_hash
-  j[:hostname] = ENV['HOSTNAME']
+  j[:hostname] = ENV["HOSTNAME"]
   json j
 end
 
diff --git a/app_test.rb b/app_test.rb
index 653da06..1d355db 100644
--- a/app_test.rb
+++ b/app_test.rb
@@ -1,8 +1,8 @@
-ENV['APP_ENV'] = 'test'
+ENV["APP_ENV"] = "test"
 
-require './app'
-require 'test/unit'
-require 'rack/test'
+require "./app"
+require "test/unit"
+require "rack/test"
 
 class ToyTest < Test::Unit::TestCase
   include Rack::Test::Methods
@@ -12,7 +12,7 @@ class ToyTest < Test::Unit::TestCase
   end
 
   def test_root
-    get '/'
+    get "/"
     assert last_response.ok?
     assert_equal "hello there!\n", last_response.body
   end
diff --git a/config.ru b/config.ru
index cbc11d2..546d4cb 100644
--- a/config.ru
+++ b/config.ru
@@ -1,6 +1,6 @@
-require 'bundler/setup'
-require 'sinatra'
+require "bundler/setup"
+require "sinatra"
 
-require './app'
+require "./app"
 
-run Sinatra::Application
\ No newline at end of file
+run Sinatra::Application
diff --git a/config/puma.rb b/config/puma.rb
index 7076950..2d4827a 100644
--- a/config/puma.rb
+++ b/config/puma.rb
@@ -1,3 +1,3 @@
 # workers 3
-pidfile '/run/app/pid'
+pidfile "/run/app/pid"
 preload_app!