diff --git a/Gemfile.lock b/Gemfile.lock
index 9b89349..70ab3d9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -104,7 +104,7 @@ GEM
       rack (>= 1.2, < 3)
     psych (2.2.1)
     public_suffix (2.0.4)
-    rack (2.0.7)
+    rack (2.0.8)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (5.0.0.1)