diff --git a/Gemfile.lock b/Gemfile.lock
index 73f5160..30e6fe6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -129,7 +129,7 @@ GEM
     pg (0.21.0)
     popper_js (1.12.5)
     puma (3.11.0)
-    rack (2.0.3)
+    rack (2.2.3)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (5.0.6)