diff --git a/fluentd.gemspec b/fluentd.gemspec
index 879c26f6ff..8171bc1d3f 100644
--- a/fluentd.gemspec
+++ b/fluentd.gemspec
@@ -31,6 +31,11 @@ Gem::Specification.new do |gem|
   gem.add_runtime_dependency("webrick", ["~> 1.4"])
   gem.add_runtime_dependency("console", ["< 1.24"])
 
+  # gems that aren't default gems as of Ruby 3.5
+  # logger 1.6.3 or later cause bug on windows,
+  # hold on 1.6.2 for a while. see https://github.com/ruby/logger/issues/107
+  gem.add_runtime_dependency("logger", ["1.6.2"])
+
   # build gem for a certain platform. see also Rakefile
   fake_platform = ENV['GEM_BUILD_FAKE_PLATFORM'].to_s
   gem.platform = fake_platform unless fake_platform.empty?