diff --git a/Gemfile.lock b/Gemfile.lock
index 22c7be4..d49e0d4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -105,7 +105,7 @@ GEM
     public_suffix (4.0.6)
     puma (3.11.3)
     racc (1.5.2)
-    rack (2.2.3)
+    rack (2.2.6.2)
     rack-test (0.8.3)
       rack (>= 1.0, < 3)
     rails (5.1.5)