diff --git a/Gemfile.lock b/Gemfile.lock
index e998d43..caaeb04 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -132,7 +132,7 @@ GEM
       pry (~> 0.10)
     puma (4.3.3)
       nio4r (~> 2.0)
-    rack (2.0.8)
+    rack (2.2.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.4)