diff --git a/Gemfile.lock b/Gemfile.lock
index 00207820..171d5e1e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -46,7 +46,7 @@ GEM
       method_source (~> 0.8)
       slop (~> 3.3.1)
       spoon (~> 0.0)
-    rack (1.5.2)
+    rack (2.2.3)
     rack-accept (0.4.5)
       rack (>= 0.4)
     rack-mount (0.8.3)