diff --git a/Gemfile.lock b/Gemfile.lock
index dfb8c28..aa74b9a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -90,7 +90,7 @@ GEM
       mini_portile2 (~> 2.2.0)
     public_suffix (2.0.5)
     puma (3.9.1)
-    rack (2.0.3)
+    rack (2.0.8)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (5.1.2)