diff --git a/Gemfile.lock b/Gemfile.lock
index 379cc16..1505771 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -60,7 +60,7 @@ GEM
       mime-types (< 4)
       padrino-core (= 0.15.0)
     padrino-support (0.15.0)
-    rack (2.2.6.2)
+    rack (2.2.6.4)
     rack-protection (2.2.4)
       rack
     ruby2_keywords (0.0.5)