diff --git a/tool/bundler/test_gems.rb b/tool/bundler/test_gems.rb
index 61377b77be..2d66c98dbd 100644
--- a/tool/bundler/test_gems.rb
+++ b/tool/bundler/test_gems.rb
@@ -5,7 +5,7 @@ source "https://rubygems.org"
 gem "rack", "~> 3.0"
 gem "rackup", "~> 2.1"
 gem "base64"
-gem "webrick", "~> 1.8"
+gem "webrick", "~> 1.9"
 gem "rack-test", "~> 2.1"
 gem "compact_index", "~> 0.15.0"
 gem "sinatra", "~> 4.1"