diff --git a/Gemfile.lock b/Gemfile.lock
index 08d92df..710f326 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -59,7 +59,7 @@ GEM
     mime-types (1.16)
     multi_json (1.0.3)
     polyglot (0.3.1)
-    rack (1.2.3)
+    rack (1.2.8)
     rack-mount (0.6.14)
       rack (>= 1.0.0)
     rack-test (0.5.7)