diff --git a/Gemfile.lock b/Gemfile.lock
index 97cdc00..7f92934 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -88,7 +88,7 @@ GEM
     nokogiri (1.6.8.1)
       mini_portile2 (~> 2.1.0)
     puma (3.6.0)
-    rack (2.0.1)
+    rack (2.2.3)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (5.0.0.1)