diff --git a/Gemfile.lock b/Gemfile.lock
index 23b2b38..b8955e0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -108,7 +108,7 @@ GEM
     puma (3.11.4)
     pygments.rb (1.2.1)
       multi_json (>= 1.0.0)
-    rack (2.0.5)
+    rack (2.2.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.1.6)