diff --git a/Gemfile.lock b/Gemfile.lock
index 1c2a399..10ee4a0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -125,7 +125,7 @@ GEM
     puma (3.5.2)
     quiet_assets (1.0.3)
       railties (>= 3.1, < 5.0)
-    rack (1.6.4)
+    rack (1.6.12)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.6)