diff --git a/Gemfile.lock b/Gemfile.lock
index 05b114c..112378f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -170,7 +170,7 @@ GEM
     pry-byebug (3.0.1)
       byebug (~> 3.4)
       pry (~> 0.10)
-    rack (1.6.0)
+    rack (1.6.12)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.0)