diff --git a/Gemfile.lock b/Gemfile.lock
index ed3bf44..5c75a48 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -85,7 +85,7 @@ GEM
       racc (~> 1.4)
     puma (3.12.6)
     racc (1.6.2)
-    rack (2.2.6.2)
+    rack (2.2.6.4)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (5.0.7.2)