diff --git a/Gemfile.lock b/Gemfile.lock
index da98a6f..776c059 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -119,7 +119,7 @@ GEM
     pg (0.19.0)
     public_suffix (2.0.5)
     puma (3.6.2)
-    rack (1.6.8)
+    rack (1.6.12)
     rack-protection (1.5.3)
       rack
     rack-test (0.6.3)