diff --git a/Gemfile b/Gemfile
index 41c97a9a..8d69492b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,3 +8,7 @@ git_source(:github) { |repo_name| "https://github.com/#{repo_name}" }
 ruby '>=2.7.1'
 
 gem 'github-pages', group: :jekyll_plugins
+
+if Gem::Version.new(RUBY_VERSION) >= Gem::Version.new('3.0.0')
+    gem 'webrick', '>= 1.6.1'
+end
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