diff --git a/Gemfile.lock b/Gemfile.lock
index f8072c1..ba9587e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -996,7 +996,7 @@ GEM
     public_suffix (4.0.3)
     puma (4.3.1)
       nio4r (~> 2.0)
-    rack (2.1.1)
+    rack (2.1.4)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.4.1)