diff --git a/Gemfile.lock b/Gemfile.lock
index 5fc8b60..b086e0a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -141,7 +141,7 @@ GEM
     public_suffix (4.0.6)
     puma (3.12.6)
     racc (1.6.0)
-    rack (2.2.3)
+    rack (2.2.6.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.1.7)