diff --git a/Gemfile.lock b/Gemfile.lock
index 595fec0..88920f8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -121,7 +121,7 @@ GEM
       rack (>= 1.2, < 3)
     public_suffix (3.0.3)
     puma (3.12.4)
-    rack (2.0.8)
+    rack (2.2.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.2)