diff --git a/Gemfile.lock b/Gemfile.lock
index 6b8e8b2..71545f3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -110,7 +110,7 @@ GEM
     nori (2.6.0)
     pg (0.20.0)
     puma (3.12.0)
-    rack (2.0.5)
+    rack (2.2.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.1)