diff --git a/Gemfile.lock b/Gemfile.lock
index 5cb3595..b2f671e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -151,7 +151,7 @@ GEM
     pry-rails (0.3.4)
       pry (>= 0.9.10)
     puma (3.6.0)
-    rack (1.6.11)
+    rack (1.6.12)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.6)