diff --git a/Gemfile.lock b/Gemfile.lock
index ad7c798..0cafb13 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -25,7 +25,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
-    rack (2.0.8)
+    rack (3.0.7)
     rack-test (0.6.3)
       rack (>= 1.0)
     rake (10.5.0)