diff --git a/Gemfile b/Gemfile
index d1d370852a7c..2c179831b6a9 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,5 +2,7 @@
 
 source "https://rubygems.org"
 
+gem 'wdm', '>= 0.1.0' if Gem.win_platform?
+
 gemspec
 
diff --git a/beautiful-jekyll-theme.gemspec b/beautiful-jekyll-theme.gemspec
index d02a5cfe79d3..214d2916dc4f 100644
--- a/beautiful-jekyll-theme.gemspec
+++ b/beautiful-jekyll-theme.gemspec
@@ -23,6 +23,7 @@ Gem::Specification.new do |spec|
   spec.add_runtime_dependency "kramdown-parser-gfm", "~> 1.1"
   spec.add_runtime_dependency "kramdown", "~> 2.3"
   spec.add_runtime_dependency "webrick", "~> 1.8"
+  spec.add_runtime_dependency "tzinfo-data", "~> 1.2023.3"
 
   spec.add_development_dependency "bundler", ">= 1.16"
   spec.add_development_dependency "rake", "~> 12.0"