diff --git a/Gemfile.lock b/Gemfile.lock
index 143cbb8..556fc2c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -59,7 +59,7 @@ GEM
     parser (3.1.2.0)
       ast (~> 2.4.1)
     racc (1.6.2)
-    rack (2.2.6.2)
+    rack (2.2.6.4)
     rack-test (2.0.2)
       rack (>= 1.3)
     rails-dom-testing (2.0.3)