diff --git a/Gemfile.lock b/Gemfile.lock
index 4e59ba6..dce989a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -87,7 +87,7 @@ GEM
     nokogiri (1.10.0)
       mini_portile2 (~> 2.4.0)
     puma (3.12.0)
-    rack (2.0.6)
+    rack (2.0.8)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.2)