diff --git a/Gemfile.lock b/Gemfile.lock
index 63f8e42..8577478 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -72,7 +72,7 @@ GEM
       rack (>= 1.2, < 3)
     pg (1.1.4)
     public_suffix (3.0.3)
-    rack (2.0.6)
+    rack (2.2.3)
     rake (12.3.2)
     rdoc (3.12.2)
       json (~> 1.4)