diff --git a/Gemfile.lock b/Gemfile.lock
index c7a8454..6824795 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -92,7 +92,7 @@ GEM
       mini_portile2 (~> 2.1.0)
     pg (0.19.0)
     puma (3.12.1)
-    rack (2.0.7)
+    rack (2.0.8)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (5.0.1)