diff --git a/Gemfile b/Gemfile
index 6438466..ffef29a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -17,3 +17,6 @@ end
 
 # Performance-booster for watching directories on Windows
 gem "wdm", "~> 0.1.1", :install_if => Gem.win_platform?
+
+# Jekyll <= 4.2.0 compatibility with Ruby 3.0
+gem "webrick", "~> 1.7"
diff --git a/jekyll-theme-chirpy.gemspec b/jekyll-theme-chirpy.gemspec
index 95090e0..2c19b46 100644
--- a/jekyll-theme-chirpy.gemspec
+++ b/jekyll-theme-chirpy.gemspec
@@ -23,7 +23,7 @@ Gem::Specification.new do |spec|
     "plugin_type"       => "theme"
   }
 
-  spec.required_ruby_version = [">= 2.4", "< 3.0"]
+  spec.required_ruby_version = ">= 2.4"
 
   spec.add_runtime_dependency "jekyll", "~> 4.1"
   spec.add_runtime_dependency "jekyll-paginate", "~> 1.1"