diff --git a/sandbox/ChibiRuby.Benchmark/ruby/optcarrot b/sandbox/ChibiRuby.Benchmark/ruby/optcarrot
index 36a8f6b5..c215378a 160000
--- a/sandbox/ChibiRuby.Benchmark/ruby/optcarrot
+++ b/sandbox/ChibiRuby.Benchmark/ruby/optcarrot
@@ -1 +1 @@
-Subproject commit 36a8f6b525ca13c8db244eed94b1361ec1394725
+Subproject commit c215378a27b2dce8d8e5d98a3ed75e0354c5a840