diff --git a/Gemfile.lock b/Gemfile.lock
index b3b1e43..0d64a17 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -138,7 +138,7 @@ GEM
     puma (4.3.11)
       nio4r (~> 2.0)
     racc (1.6.0)
-    rack (2.1.1)
+    rack (2.2.6.3)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (5.0.7.2)