diff --git a/Gemfile.lock b/Gemfile.lock
index 0731eea..f6d77cc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -128,7 +128,7 @@ GEM
     popper_js (1.16.0)
     public_suffix (4.0.3)
     puma (3.12.2)
-    rack (2.1.1)
+    rack (2.2.3.1)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.1.7)