diff --git a/Gemfile.lock b/Gemfile.lock
index 056cdc5..a633f15 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -97,7 +97,7 @@ GEM
       method_source (~> 1.0)
     ptools (1.3.5)
     public_suffix (3.0.3)
-    rack (2.0.7)
+    rack (2.2.2)
     rake (12.3.2)
     rb-fsevent (0.10.3)
     rb-inotify (0.10.0)