diff --git a/Gemfile.lock b/Gemfile.lock
index e2b8647..ea81626 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -144,7 +144,7 @@ GEM
     public_suffix (3.1.0)
     puma (3.12.2)
     puma (3.12.2-java)
-    rack (2.1.2)
+    rack (2.2.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.3)