diff --git a/Gemfile.lock b/Gemfile.lock
index 7097fc2..d5ab836 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -71,7 +71,7 @@ GEM
       method_source (~> 0.8)
       slop (~> 3.4)
     r18n-core (1.1.8)
-    rack (1.5.2)
+    rack (1.6.12)
     rack-protection (1.5.2)
       rack
     rack-test (0.6.2)