diff --git a/.rubocop.yml b/.rubocop.yml
index 8ac38b2..bc4d919 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -8,9 +8,6 @@ AllCops:
   NewCops: enable
   TargetRubyVersion: 3.1
 
-Gemspec/DevelopmentDependencies:
-  EnforcedStyle: gemspec
-
 Layout/HashAlignment:
   EnforcedColonStyle: table
   EnforcedHashRocketStyle: table
@@ -35,15 +32,9 @@ Naming/RescuedExceptionsVariableName:
 Naming/VariableNumber:
   EnforcedStyle: snake_case
 
-RSpec/Capybara/FeatureMethods:
-  Enabled: false
-
 RSpec/ExampleLength:
   Max: 10
 
-RSpec/FilePath:
-  Enabled: false
-
 RSpec/IndexedLet:
   Max: 2
 
diff --git a/CHANGELOG.markdown b/CHANGELOG.markdown
index cfdd6ed..946250a 100644
--- a/CHANGELOG.markdown
+++ b/CHANGELOG.markdown
@@ -1,5 +1,9 @@
 # Changelog
 
+## Unreleased
+
+* Update development dependencies. (Tristan Dunn)
+
 ## 6.0.0 — March 21st, 2024
 
 * Add support for Ruby 3.3. (Tristan Dunn)
diff --git a/Gemfile b/Gemfile
index 5e0d818..0c7a98f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,6 +4,20 @@ source "https://rubygems.org"
 
 gemspec
 
+gem "capybara",            "3.40.0"
+gem "puma",                "6.4.2"
+gem "pusher",              "2.0.3"
+gem "rake",                "13.2.1"
+gem "rspec",               "3.13.0"
+gem "rubocop",             "1.65.0"
+gem "rubocop-capybara",    "2.21.0"
+gem "rubocop-performance", "1.21.1"
+gem "rubocop-rake",        "0.6.0"
+gem "rubocop-rspec",       "3.0.3"
+gem "selenium-webdriver",  "4.23.0"
+gem "sinatra",             "3.2.0"
+gem "yard",                "0.9.36"
+
 group :test do
   gem "simplecov-console", "0.9.1", require: false
 end
diff --git a/pusher-fake.gemspec b/pusher-fake.gemspec
index 91acaa7..11c7a06 100644
--- a/pusher-fake.gemspec
+++ b/pusher-fake.gemspec
@@ -26,18 +26,4 @@ Gem::Specification.new do |s|
   s.add_dependency "em-websocket",    "~> 0.5"
   s.add_dependency "multi_json",      "~> 1.6"
   s.add_dependency "thin",            "~> 1"
-
-  s.add_development_dependency "capybara",            "3.40.0"
-  s.add_development_dependency "puma",                "6.4.2"
-  s.add_development_dependency "pusher",              "2.0.3"
-  s.add_development_dependency "rake",                "13.1.0"
-  s.add_development_dependency "rspec",               "3.13.0"
-  s.add_development_dependency "rubocop",             "1.61.0"
-  s.add_development_dependency "rubocop-capybara",    "2.20.0"
-  s.add_development_dependency "rubocop-performance", "1.20.2"
-  s.add_development_dependency "rubocop-rake",        "0.6.0"
-  s.add_development_dependency "rubocop-rspec",       "2.27.1"
-  s.add_development_dependency "selenium-webdriver",  "4.18.1"
-  s.add_development_dependency "sinatra",             "3.2.0"
-  s.add_development_dependency "yard",                "0.9.36"
 end