diff --git a/tool/bundler/rubocop_gems.rb.lock b/tool/bundler/rubocop_gems.rb.lock
index 02f081ea35..2e47e5a894 100644
--- a/tool/bundler/rubocop_gems.rb.lock
+++ b/tool/bundler/rubocop_gems.rb.lock
@@ -53,6 +53,7 @@ PLATFORMS
   x64-mingw-ucrt
   x86_64-darwin-19
   x86_64-darwin-20
+  x86_64-darwin-21
   x86_64-linux
 
 DEPENDENCIES
diff --git a/tool/bundler/standard_gems.rb.lock b/tool/bundler/standard_gems.rb.lock
index e939483dac..bf21ad5da2 100644
--- a/tool/bundler/standard_gems.rb.lock
+++ b/tool/bundler/standard_gems.rb.lock
@@ -59,6 +59,7 @@ PLATFORMS
   x64-mingw-ucrt
   x86_64-darwin-19
   x86_64-darwin-20
+  x86_64-darwin-21
   x86_64-linux
 
 DEPENDENCIES