diff --git a/Gemfile.lock b/Gemfile.lock
index e20dc37..34f39aa 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -105,7 +105,7 @@ GEM
     powerpack (0.1.2)
     public_suffix (3.0.2)
     puma (3.11.4)
-    rack (2.0.5)
+    rack (2.2.3)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (5.0.7)