diff --git a/Gemfile.lock b/Gemfile.lock
index 528a83d1..9456a09b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -152,7 +152,7 @@ GEM
       method_source (~> 0.8.1)
       slop (~> 3.4)
     puma (3.4.0)
-    rack (1.6.4)
+    rack (1.6.13)
     rack-cache (1.6.1)
       rack (>= 0.4)
     rack-protection (1.5.3)