diff --git a/Gemfile.lock b/Gemfile.lock
index b608454..b7f4b0b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -253,7 +253,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
     public_suffix (4.0.1)
-    rack (2.0.7)
+    rack (2.0.8)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.3)