diff --git a/Gemfile.lock b/Gemfile.lock
index ee08d1d..834ebf2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -145,7 +145,7 @@ GEM
       arel (>= 6)
     public_suffix (3.0.1)
     puma (3.11.2)
-    rack (2.0.3)
+    rack (2.2.3)
     rack-test (0.8.2)
       rack (>= 1.0, < 3)
     rails (5.1.4)