diff --git a/Gemfile.lock b/Gemfile.lock
index e23bd35..3a45844 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -102,7 +102,7 @@ GEM
     parser (2.7.1.4)
       ast (~> 2.4.1)
     racc (1.6.2)
-    rack (2.2.7)
+    rack (2.2.8.1)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.4.3)