diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index fd2aa28..de1975b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: ['2.7', '3.0', '3.1', '3.2', '3.3', 'jruby-head']
+        ruby-version: ['3.0', '3.1', '3.2', '3.3', 'jruby-head']
 
     steps:
       - uses: actions/checkout@v4
diff --git a/.rubocop.yml b/.rubocop.yml
index a30ab8e..03af185 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -2,7 +2,7 @@ require:
   - rubocop-rake
 
 AllCops:
-  TargetRubyVersion: 2.7  # lowest supported version
+  TargetRubyVersion: 3.0 # lowest supported version
   NewCops: enable
 
 Layout/ArgumentAlignment:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index eff5e3a..1448ae2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ### Unreleased
 
+### Version v1.18.0
+
+ * Drop Ruby 2.7 compatibility for parity with Premailer [#149](https://github.com/premailer/css_parser/pull/149)
+
 ### Version v1.17.1
 
  * Improve security by using `File.read` instead of `IO.read` [#149](https://github.com/premailer/css_parser/pull/149)
diff --git a/Gemfile.lock b/Gemfile.lock
index b6f2222..141e00e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    css_parser (1.17.1)
+    css_parser (1.18.0)
       addressable
 
 GEM
diff --git a/css_parser.gemspec b/css_parser.gemspec
index 242c11c..d8cf155 100644
--- a/css_parser.gemspec
+++ b/css_parser.gemspec
@@ -11,7 +11,7 @@ Gem::Specification.new name, CssParser::VERSION do |s|
   s.author = 'Alex Dunae'
   s.files = Dir.glob('lib/**/*') + ['MIT-LICENSE']
   s.license = 'MIT'
-  s.required_ruby_version = '>= 2.7'
+  s.required_ruby_version = '>= 3.0'
 
   s.metadata['changelog_uri'] = 'https://github.com/premailer/css_parser/blob/master/CHANGELOG.md'
   s.metadata['source_code_uri'] = 'https://github.com/premailer/css_parser'
diff --git a/lib/css_parser/parser.rb b/lib/css_parser/parser.rb
index 357b79e..609b0ac 100644
--- a/lib/css_parser/parser.rb
+++ b/lib/css_parser/parser.rb
@@ -16,7 +16,7 @@ class CircularReferenceError < StandardError; end
   # [<tt>import</tt>] Follow <tt>@import</tt> rules. Boolean, default is <tt>true</tt>.
   # [<tt>io_exceptions</tt>] Throw an exception if a link can not be found. Boolean, default is <tt>true</tt>.
   class Parser
-    USER_AGENT = "Ruby CSS Parser/#{CssParser::VERSION} (https://github.com/premailer/css_parser)"
+    USER_AGENT = "Ruby CSS Parser/#{CssParser::VERSION} (https://github.com/premailer/css_parser)".freeze
     STRIP_CSS_COMMENTS_RX = %r{/\*.*?\*/}m.freeze
     STRIP_HTML_COMMENTS_RX = /<!--|-->/m.freeze
 
diff --git a/lib/css_parser/version.rb b/lib/css_parser/version.rb
index 8fb735d..c838ded 100644
--- a/lib/css_parser/version.rb
+++ b/lib/css_parser/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module CssParser
-  VERSION = '1.17.1'.freeze
+  VERSION = '1.18.0'.freeze
 end