diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 58b2ffb..16ec60c 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -24,7 +24,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: ["2.7", "3.0", "3.1"]
+        ruby-version: ["3.0", "3.1"]
 
     services:
       db:
@@ -67,7 +67,7 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 3.0
+          ruby-version: "3.0"
           bundler-cache: true # runs 'bundle install' and caches installed gems automatically
       - name: Run rubocop
         run: bundle exec rubocop
@@ -95,7 +95,7 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 3.0
+          ruby-version: "3.0"
           bundler-cache: true # runs 'bundle install' and caches installed gems automatically
       - name: Prepare
         env:
diff --git a/Gemfile.lock b/Gemfile.lock
index 284a9bc..e5618cf 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,25 +1,25 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    actionmailer (7.0.4)
-      actionpack (= 7.0.4)
-      actionview (= 7.0.4)
-      activejob (= 7.0.4)
-      activesupport (= 7.0.4)
+    actionmailer (7.0.4.3)
+      actionpack (= 7.0.4.3)
+      actionview (= 7.0.4.3)
+      activejob (= 7.0.4.3)
+      activesupport (= 7.0.4.3)
       mail (~> 2.5, >= 2.5.4)
       net-imap
       net-pop
       net-smtp
       rails-dom-testing (~> 2.0)
-    actionpack (7.0.4)
-      actionview (= 7.0.4)
-      activesupport (= 7.0.4)
+    actionpack (7.0.4.3)
+      actionview (= 7.0.4.3)
+      activesupport (= 7.0.4.3)
       rack (~> 2.0, >= 2.2.0)
       rack-test (>= 0.6.3)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.2.0)
-    actionview (7.0.4)
-      activesupport (= 7.0.4)
+    actionview (7.0.4.3)
+      activesupport (= 7.0.4.3)
       builder (~> 3.1)
       erubi (~> 1.4)
       rails-dom-testing (~> 2.0)
@@ -29,15 +29,15 @@ GEM
       activemodel (>= 4.1, < 7.1)
       case_transform (>= 0.2)
       jsonapi-renderer (>= 0.1.1.beta1, < 0.3)
-    activejob (7.0.4)
-      activesupport (= 7.0.4)
+    activejob (7.0.4.3)
+      activesupport (= 7.0.4.3)
       globalid (>= 0.3.6)
-    activemodel (7.0.4)
-      activesupport (= 7.0.4)
-    activerecord (7.0.4)
-      activemodel (= 7.0.4)
-      activesupport (= 7.0.4)
-    activesupport (7.0.4)
+    activemodel (7.0.4.3)
+      activesupport (= 7.0.4.3)
+    activerecord (7.0.4.3)
+      activemodel (= 7.0.4.3)
+      activesupport (= 7.0.4.3)
+    activesupport (7.0.4.3)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 1.6, < 2)
       minitest (>= 5.1)
@@ -45,11 +45,11 @@ GEM
     airbrussh (1.4.1)
       sshkit (>= 1.6.1, != 1.7.0)
     ast (2.4.2)
-    bootsnap (1.13.0)
+    bootsnap (1.16.0)
       msgpack (~> 1.2)
     builder (3.2.4)
     byebug (11.1.3)
-    capistrano (3.17.1)
+    capistrano (3.17.2)
       airbrussh (>= 1.0.0)
       i18n
       rake (>= 10.0.0)
@@ -64,20 +64,21 @@ GEM
     case_transform (0.2)
       activesupport
     choice (0.2.0)
-    concurrent-ruby (1.1.10)
+    concurrent-ruby (1.2.2)
     crass (1.0.6)
+    date (3.3.3)
     docile (1.4.0)
-    erubi (1.11.0)
+    erubi (1.12.0)
     exception_notification (4.5.0)
       actionmailer (>= 5.2, < 8)
       activesupport (>= 5.2, < 8)
-    globalid (1.0.0)
+    globalid (1.1.0)
       activesupport (>= 5.0)
     i18n (1.12.0)
       concurrent-ruby (~> 1.0)
-    json (2.6.2)
+    json (2.6.3)
     jsonapi-renderer (0.2.2)
-    jwt (2.5.0)
+    jwt (2.7.0)
     kaminari (1.2.2)
       activesupport (>= 4.1.0)
       kaminari-actionview (= 1.2.2)
@@ -90,47 +91,51 @@ GEM
       activerecord
       kaminari-core (= 1.2.2)
     kaminari-core (1.2.2)
-    loofah (2.19.0)
+    loofah (2.19.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
-    mail (2.7.1)
+    mail (2.8.1)
       mini_mime (>= 0.1.1)
+      net-imap
+      net-pop
+      net-smtp
     method_source (1.0.0)
     mini_mime (1.1.2)
-    mini_portile2 (2.8.0)
-    minitest (5.16.3)
+    mini_portile2 (2.8.1)
+    minitest (5.18.0)
     mocha (2.0.2)
       ruby2_keywords (>= 0.0.5)
-    msgpack (1.6.0)
+    msgpack (1.7.0)
     multi_json (1.15.0)
-    net-imap (0.3.1)
+    net-imap (0.3.4)
+      date
       net-protocol
     net-pop (0.1.2)
       net-protocol
-    net-protocol (0.1.3)
+    net-protocol (0.2.1)
       timeout
     net-scp (4.0.0)
       net-ssh (>= 2.6.5, < 8.0.0)
     net-smtp (0.3.3)
       net-protocol
-    net-ssh (7.0.1)
+    net-ssh (7.1.0)
     nio4r (2.5.8)
-    nokogiri (1.13.9)
+    nokogiri (1.14.2)
       mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
-    nokogiri (1.13.9-x86_64-linux)
+    nokogiri (1.14.2-x86_64-linux)
       racc (~> 1.4)
     parallel (1.22.1)
-    parser (3.1.2.1)
+    parser (3.2.1.1)
       ast (~> 2.4.1)
     pg (1.2.3)
-    puma (6.0.0)
+    puma (6.2.1)
       nio4r (~> 2.0)
-    racc (1.6.0)
-    rack (2.2.4)
-    rack-cors (1.1.1)
+    racc (1.6.2)
+    rack (2.2.6.4)
+    rack-cors (2.0.1)
       rack (>= 2.0.0)
-    rack-test (2.0.2)
+    rack-test (2.1.0)
       rack (>= 1.3)
     rails-dom-testing (2.0.3)
       activesupport (>= 4.2.0)
@@ -140,68 +145,68 @@ GEM
       activesupport (>= 4.2)
       choice (~> 0.2.0)
       ruby-graphviz (~> 1.2)
-    rails-html-sanitizer (1.4.3)
-      loofah (~> 2.3)
+    rails-html-sanitizer (1.5.0)
+      loofah (~> 2.19, >= 2.19.1)
     rails-i18n (7.0.6)
       i18n (>= 0.7, < 2)
       railties (>= 6.0.0, < 8)
-    railties (7.0.4)
-      actionpack (= 7.0.4)
-      activesupport (= 7.0.4)
+    railties (7.0.4.3)
+      actionpack (= 7.0.4.3)
+      activesupport (= 7.0.4.3)
       method_source
       rake (>= 12.2)
       thor (~> 1.0)
       zeitwerk (~> 2.5)
     rainbow (3.1.1)
     rake (13.0.6)
-    regexp_parser (2.6.0)
+    regexp_parser (2.7.0)
     rexml (3.2.5)
-    rubocop (1.38.0)
+    rubocop (1.48.1)
       json (~> 2.3)
       parallel (~> 1.10)
-      parser (>= 3.1.2.1)
+      parser (>= 3.2.0.0)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 1.8, < 3.0)
       rexml (>= 3.2.5, < 4.0)
-      rubocop-ast (>= 1.23.0, < 2.0)
+      rubocop-ast (>= 1.26.0, < 2.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 1.4.0, < 3.0)
-    rubocop-ast (1.23.0)
-      parser (>= 3.1.1.0)
-    rubocop-performance (1.15.0)
+      unicode-display_width (>= 2.4.0, < 3.0)
+    rubocop-ast (1.28.0)
+      parser (>= 3.2.1.0)
+    rubocop-performance (1.16.0)
       rubocop (>= 1.7.0, < 2.0)
       rubocop-ast (>= 0.4.0)
-    rubocop-rails (2.17.2)
+    rubocop-rails (2.18.0)
       activesupport (>= 4.2.0)
       rack (>= 1.1)
       rubocop (>= 1.33.0, < 2.0)
     ruby-graphviz (1.2.5)
       rexml
-    ruby-progressbar (1.11.0)
+    ruby-progressbar (1.13.0)
     ruby2_keywords (0.0.5)
-    simplecov (0.21.2)
+    simplecov (0.22.0)
       docile (~> 1.1)
       simplecov-html (~> 0.11)
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.12.3)
     simplecov-lcov (0.8.0)
     simplecov_json_formatter (0.1.4)
-    spring (4.1.0)
-    sqlite3 (1.5.3)
+    spring (4.1.1)
+    sqlite3 (1.6.2)
       mini_portile2 (~> 2.8.0)
-    sqlite3 (1.5.3-x86_64-linux)
-    sshkit (1.21.3)
+    sqlite3 (1.6.2-x86_64-linux)
+    sshkit (1.21.4)
       net-scp (>= 1.1.2)
       net-ssh (>= 2.8.0)
     streamio-ffmpeg (3.0.2)
       multi_json (~> 1.8)
     swagger-blocks (3.0.0)
     thor (1.2.1)
-    timeout (0.3.0)
-    tzinfo (2.0.5)
+    timeout (0.3.2)
+    tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
-    unicode-display_width (2.3.0)
-    zeitwerk (2.6.6)
+    unicode-display_width (2.4.2)
+    zeitwerk (2.6.7)
 
 PLATFORMS
   ruby
diff --git a/app/controllers/auth/jwt.rb b/app/controllers/auth/jwt.rb
index bf7ebe4..fde042d 100644
--- a/app/controllers/auth/jwt.rb
+++ b/app/controllers/auth/jwt.rb
@@ -18,7 +18,7 @@ def encode(payload)
       end
 
       def decode(token)
-        HashWithIndifferentAccess.new(JWT.decode(token, secret)[0])
+        ActiveSupport::HashWithIndifferentAccess.new(JWT.decode(token, secret)[0])
       rescue StandardError
         nil
       end
diff --git a/config.ru b/config.ru
index 667e328..afd13e2 100644
--- a/config.ru
+++ b/config.ru
@@ -2,5 +2,5 @@
 
 # This file is used by Rack-based servers to start the application.
 
-require ::File.expand_path('config/environment', __dir__)
+require File.expand_path('config/environment', __dir__)
 run Rails.application
diff --git a/config/deploy.rb b/config/deploy.rb
index ceca43b..e0329fd 100644
--- a/config/deploy.rb
+++ b/config/deploy.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 # config valid only for current version of Capistrano
-lock '3.17.1'
+lock '3.17.2'
 
 set :application, 'raar'
 set :repo_url, 'git@github.com:radiorabe/raar.git'
diff --git a/config/environments/production.rb b/config/environments/production.rb
index d60b35c..6387a29 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -40,7 +40,7 @@
   config.log_tags = [:request_id]
 
   # Use default logging formatter so that PID and timestamp are not suppressed.
-  config.log_formatter = ::Logger::Formatter.new
+  config.log_formatter = Logger::Formatter.new
 
   # Use a different logger for distributed setups.
   case ENV['RAAR_LOG'].to_s.downcase.strip
diff --git a/db/seeds/broadcast_seeder.rb b/db/seeds/broadcast_seeder.rb
index ff8f605..20e8bfe 100644
--- a/db/seeds/broadcast_seeder.rb
+++ b/db/seeds/broadcast_seeder.rb
@@ -35,7 +35,7 @@ def parse_broadcasts
 
   def load_broadcasts
     input = File.read('db/seeds/broadcasts.txt')
-    input.split("\n").reject(&:blank?).map { |line| line.split("\t") }
+    input.split("\n").compact_blank.map { |line| line.split("\t") }
   end
 
   def make_time(day, time)
diff --git a/test/services/downgrade/downgrader_test.rb b/test/services/downgrade/downgrader_test.rb
index 25377db..dd3dd23 100644
--- a/test/services/downgrade/downgrader_test.rb
+++ b/test/services/downgrade/downgrader_test.rb
@@ -72,11 +72,10 @@ class DowngraderTest < ActiveSupport::TestCase
       assert_difference('AudioFile.count', -2) do
         [file1, file2, file3].shuffle.each { |file| downgrader.handle(file) }
       end
-      assert_not AudioFile.exists?(id: file1.id)
-      assert_not AudioFile.exists?(id: file2.id)
-      assert_not AudioFile.exists?(id: file3.id)
       lower = AudioFile.where(broadcast_id: b1.id, bitrate: 192, channels: 2).first
       assert_equal path, lower.path
+      old_ids = [file1, file2, file3].map(&:id) - [lower.id]
+      assert_not AudioFile.exists?(id: old_ids)
     end
 
     test 'just deletes higher-bitrate file when lower-bitrate already exists' do