diff --git a/Gemfile.lock b/Gemfile.lock
index 723f5e2..5bd8b4c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -181,7 +181,7 @@ GEM
       ast (~> 2.4.0)
     pg (1.0.0)
     publishable (1.0.4)
-    rack (2.0.5)
+    rack (2.2.3)
     rack-test (1.0.0)
       rack (>= 1.0, < 3)
     rails (5.2.0)