diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index ba405f3..7668988 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -14,14 +14,14 @@ jobs:
     strategy:
       matrix:
         ruby:
-          - '3.2.1'
+          - '4.0.2'
 
     steps:
-    - uses: actions/checkout@v3
-    - name: Set up Ruby
-      uses: ruby/setup-ruby@v1
-      with:
-        ruby-version: ${{ matrix.ruby }}
-        bundler-cache: true
-    - name: Run the default task
-      run: bundle exec rake
+      - uses: actions/checkout@v3
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true
+      - name: Run the default task
+        run: bundle exec rake
diff --git a/.rubocop.yml b/.rubocop.yml
new file mode 100644
index 0000000..6d94d6d
--- /dev/null
+++ b/.rubocop.yml
@@ -0,0 +1,16 @@
+Layout/LineLength:
+  Enabled: true
+  Max: 120
+
+Style/FrozenStringLiteralComment:
+  Enabled: false
+
+Style/ClassAndModuleChildren:
+  Enabled: false
+
+Style/HashSyntax:
+  Enabled: false
+
+Style/StringLiterals:
+  Enabled: false
+  # EnforcedStyle: "double_quotes"
diff --git a/.travis.yml b/.travis.yml
index 271462e..c670789 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,12 +1,11 @@
 language: ruby
 rvm:
-  - 2.4.0
-  - 2.5.0
-  - 2.6.0
-  - 2.7.0
   - 3.0.0
   - 3.1.0
   - 3.2.0
+  - 3.3.0
+  - 3.4.0
+  - 4.0.0
 gemfile:
   - Gemfile
 before_install:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 42f5d7a..0376ee1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 ## [Unreleased]
 
+# [0.5.0] - 2026-04-08
+
+- Update addressable dependency
+- Update gemspec dependencies
+- Remove 2.x from travis.yml
+- Update gems to latest versions
+
 # [0.4.0] - 2025-10-23
 
 - Update rexml dependency
diff --git a/Gemfile b/Gemfile
index 8ca411a..3652893 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,8 +4,3 @@ source "https://rubygems.org"
 
 # Specify your gem's dependencies in ruby_ares.gemspec
 gemspec
-
-gem "rake", "~> 13.0"
-
-gem "rspec", "~> 3.0"
-gem "webmock"
diff --git a/Gemfile.lock b/Gemfile.lock
index e01d7ff..eb8482e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,36 +1,38 @@
 PATH
   remote: .
   specs:
-    ruby_ares (0.4.0)
+    ruby_ares (0.5.0)
       ostruct
 
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.8.6)
-      public_suffix (>= 2.0.2, < 6.0)
-    crack (0.4.5)
+    addressable (2.9.0)
+      public_suffix (>= 2.0.2, < 8.0)
+    bigdecimal (4.1.1)
+    crack (1.0.1)
+      bigdecimal
       rexml
-    diff-lcs (1.5.0)
-    hashdiff (1.1.0)
+    diff-lcs (1.6.2)
+    hashdiff (1.2.1)
     ostruct (0.6.3)
-    public_suffix (5.0.4)
-    rake (13.0.6)
+    public_suffix (7.0.5)
+    rake (13.3.1)
     rexml (3.4.4)
-    rspec (3.12.0)
-      rspec-core (~> 3.12.0)
-      rspec-expectations (~> 3.12.0)
-      rspec-mocks (~> 3.12.0)
-    rspec-core (3.12.1)
-      rspec-support (~> 3.12.0)
-    rspec-expectations (3.12.2)
+    rspec (3.13.2)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-core (3.13.6)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.5)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.12.0)
-    rspec-mocks (3.12.4)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.8)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.12.0)
-    rspec-support (3.12.0)
-    webmock (3.19.1)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.7)
+    webmock (3.26.2)
       addressable (>= 2.8.0)
       crack (>= 0.3.2)
       hashdiff (>= 0.4.0, < 2.0.0)
@@ -45,4 +47,4 @@ DEPENDENCIES
   webmock
 
 BUNDLED WITH
-   2.4.19
+  4.0.10
diff --git a/lib/ruby_ares/version.rb b/lib/ruby_ares/version.rb
index 5b2a894..3f7c203 100644
--- a/lib/ruby_ares/version.rb
+++ b/lib/ruby_ares/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module RubyAres
-  VERSION = "0.4.0"
+  VERSION = "0.5.0"
 end
diff --git a/ruby_ares.gemspec b/ruby_ares.gemspec
index 7d5cbc2..73ef657 100644
--- a/ruby_ares.gemspec
+++ b/ruby_ares.gemspec
@@ -34,6 +34,10 @@ Gem::Specification.new do |spec|
   # Uncomment to register a new dependency of your gem
   spec.add_dependency "ostruct"
 
+  spec.add_development_dependency "rake", "~> 13.0"
+  spec.add_development_dependency "rspec", "~> 3.0"
+  spec.add_development_dependency "webmock"
+
   # For more information and examples about making a new gem, check out our
   # guide at: https://bundler.io/guides/creating_gem.html
 end