diff --git a/Gemfile.lock b/Gemfile.lock
index 439a687..53cf846 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -133,7 +133,7 @@ GEM
     pg (1.2.2)
     puma (4.3.1)
       nio4r (~> 2.0)
-    rack (2.1.1)
+    rack (2.2.3.1)
     rack-cors (1.1.1)
       rack (>= 2.0.0)
     rack-test (1.1.0)