diff --git a/Gemfile.lock b/Gemfile.lock
index dded63b8..3bd9bc49 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -264,7 +264,7 @@ GEM
     pry-rails (0.3.9)
       pry (>= 0.10.4)
     psych (3.1.0)
-    rack (1.6.11)
+    rack (1.6.12)
     rack-protection (1.5.5)
       rack
     rack-test (0.6.3)