diff --git a/Gemfile.lock b/Gemfile.lock
index 7060b6f..60754b4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -110,7 +110,7 @@ GEM
     popper_js (1.14.5)
     puma (4.3.12)
       nio4r (~> 2.0)
-    rack (2.0.6)
+    rack (2.2.3.1)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.2)