diff --git a/Gemfile.lock b/Gemfile.lock
index 519139a..bb187d1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -57,7 +57,7 @@ GEM
       coderay (~> 1.1)
       method_source (~> 1.0)
     psych (3.1.0)
-    rack (2.2.3)
+    rack (2.2.6.2)
     rake (13.0.1)
     rchardet (1.8.0)
     rdoc (6.2.1)