diff --git a/Gemfile.lock b/Gemfile.lock
index 599c085..972a246 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -40,7 +40,7 @@ GEM
     powerpack (0.1.1)
     public_suffix (2.0.4)
     puma (3.6.0)
-    rack (1.6.4)
+    rack (1.6.13)
     rack-protection (1.5.3)
       rack
     rack-test (0.6.3)