diff --git a/Gemfile.lock b/Gemfile.lock
index 6be8af6..a52c1c3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -52,7 +52,7 @@ GEM
     parser (3.1.0.0)
       ast (~> 2.4.1)
     racc (1.6.0)
-    rack (2.2.3)
+    rack (2.2.3.1)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails-dom-testing (2.0.3)