diff --git a/Gemfile b/Gemfile
index 19df052b..384d7c26 100644
--- a/Gemfile
+++ b/Gemfile
@@ -29,7 +29,7 @@ end
 gemspec
 
 # https://github.com/bundler/bundler/blob/89a8778c19269561926cea172acdcda241d26d23/lib/bundler/dependency.rb#L30-L54
-@windows_platforms = [:mswin, :mingw, :x64_mingw]
+@windows_platforms = [:mswin, :mswin64, :mingw, :x64_mingw]
 
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
 gem 'tzinfo-data', platforms: (@windows_platforms + [:jruby])