diff --git a/Gemfile.lock b/Gemfile.lock
index dee8955..e74d385 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -10,7 +10,7 @@ GEM
       mini_portile (~> 0.6.0)
     puma (2.8.2)
       rack (>= 1.1, < 2.0)
-    rack (1.6.0)
+    rack (1.6.13)
     rack-protection (1.5.3)
       rack
     tilt (1.3.7)