diff --git a/Gemfile.lock b/Gemfile.lock
index d594718..4550e8b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -107,7 +107,7 @@ GEM
     pg (1.1.4)
     public_suffix (3.1.1)
     puma (3.12.4)
-    rack (2.0.7)
+    rack (2.2.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.3)