diff --git a/Gemfile.lock b/Gemfile.lock
index 5193c05..666b379 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -38,7 +38,7 @@ GEM
     parser (3.1.0.0)
       ast (~> 2.4.1)
     public_suffix (4.0.6)
-    rack (2.2.3)
+    rack (2.2.4)
     rainbow (3.1.1)
     rake (12.3.3)
     readapt (1.4.3)