diff --git a/Gemfile.lock b/Gemfile.lock
index aa3f440..36c2859 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -27,7 +27,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
     public_suffix (3.0.2)
-    rack (2.0.7)
+    rack (2.0.8)
     rake (10.5.0)
     rspec (3.7.0)
       rspec-core (~> 3.7.0)