diff --git a/Gemfile.lock b/Gemfile.lock
index 01c8094..29fbb7e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -42,7 +42,7 @@ GEM
       method_source (~> 0.8)
       slop (~> 3.4)
       spoon (~> 0.0)
-    rack (1.4.1)
+    rack (2.2.3)
     rack-proxy (0.5.15)
       rack
     rack-test (0.6.2)