diff --git a/Gemfile.lock b/Gemfile.lock
index 690249a..67f5e0c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -83,7 +83,7 @@ GEM
       activesupport (>= 3.1)
     parallel (1.12.0)
     public_suffix (3.0.1)
-    rack (2.0.3)
+    rack (2.2.3)
     rb-fsevent (0.10.2)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)