diff --git a/Gemfile.lock b/Gemfile.lock
index 72ae0c9..61f6540 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -27,7 +27,7 @@ GEM
     parser (2.7.1.1)
       ast (~> 2.4.0)
     public_suffix (4.0.4)
-    rack (2.2.2)
+    rack (2.2.3)
     rainbow (3.0.0)
     rake (10.5.0)
     rchardet (1.8.0)