diff --git a/Gemfile.lock b/Gemfile.lock
index 9922abe..9168129 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -121,7 +121,7 @@ GEM
       method_source (~> 0.9.0)
     psych (3.1.0)
     public_suffix (4.0.1)
-    rack (2.0.7)
+    rack (2.2.3)
     rake (13.0.1)
     rdoc (6.2.0)
     rest-client (1.6.7)