diff --git a/Gemfile.lock b/Gemfile.lock
index d7b7279..11b1bd1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -82,7 +82,7 @@ GEM
       mini_portile2 (~> 2.1.0)
     pg (0.19.0)
     puma (3.6.1)
-    rack (2.0.1)
+    rack (2.2.3)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (5.0.0.1)