diff --git a/bench/Gemfile.lock b/bench/Gemfile.lock
index 8bd33a7..6c9a689 100644
--- a/bench/Gemfile.lock
+++ b/bench/Gemfile.lock
@@ -1,7 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    rack (2.0.6)
+    rack (2.0.8)
 
 PLATFORMS
   ruby