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-rw-r--r--tool/bundler/dev_gems.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/tool/bundler/dev_gems.rb b/tool/bundler/dev_gems.rb
index 9ede9e1d8e..ad4f0cfc39 100644
--- a/tool/bundler/dev_gems.rb
+++ b/tool/bundler/dev_gems.rb
@@ -4,7 +4,7 @@ source "https://rubygems.org"
gem "test-unit", "~> 3.0"
gem "rake", "~> 13.1"
-gem "rb_sys"
+gem "rb_sys", "0.9.124"
gem "webrick", "~> 1.6"
gem "turbo_tests", "~> 2.2.3"