diff --git a/Gemfile.lock b/Gemfile.lock
index 2238e48..2144a47 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -92,7 +92,7 @@ GEM
       activesupport (>= 3.1)
     parallel (1.12.0)
     public_suffix (2.0.5)
-    rack (2.0.3)
+    rack (2.2.8.1)
     rack-livereload (0.3.16)
       rack
     rb-fsevent (0.10.2)