diff --git a/Gemfile.lock b/Gemfile.lock
index 4eae48b5..7283992d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -123,6 +123,7 @@ GEM
       macaddr (~> 1.0)
 
 PLATFORMS
+  x86_64-darwin-21
   x86_64-darwin-23
   x86_64-linux