diff --git a/Gemfile.lock b/Gemfile.lock
index fa4a175..3542168 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -29,7 +29,7 @@ GEM
       binding_of_caller (>= 0.7)
       pry (>= 0.9.11)
     public_suffix (4.0.1)
-    rack (2.0.7)
+    rack (2.1.4)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rake (13.0.0)