diff --git a/Gemfile.lock b/Gemfile.lock
index 9164eba..da524fd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -90,7 +90,7 @@ GEM
       mini_portile2 (~> 2.3.0)
     public_suffix (3.0.1)
     puma (3.12.6)
-    rack (2.0.3)
+    rack (2.2.2)
     rack-test (0.8.2)
       rack (>= 1.0, < 3)
     rails (5.1.4)