diff --git a/Gemfile.lock b/Gemfile.lock
index 6c201b6..526ff03 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -259,7 +259,7 @@ GEM
     psych (3.1.0)
     public_suffix (3.0.3)
     puma (3.12.1)
-    rack (2.0.7)
+    rack (2.0.8)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.3)