diff --git a/Gemfile.lock b/Gemfile.lock
index 1cc1e80..b4aa1e5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -92,7 +92,7 @@ GEM
       activesupport (>= 3.1)
     parallel (1.19.1)
     public_suffix (4.0.3)
-    rack (2.1.1)
+    rack (2.2.3.1)
     rack-livereload (0.3.17)
       rack
     rb-fsevent (0.10.3)