diff --git a/ruby-lab-books/Gemfile.lock b/ruby-lab-books/Gemfile.lock
index ca88e39..c20dd28 100644
--- a/ruby-lab-books/Gemfile.lock
+++ b/ruby-lab-books/Gemfile.lock
@@ -12,7 +12,7 @@ GEM
       ast (~> 2.4.0)
     puma (4.3.3)
       nio4r (~> 2.0)
-    rack (2.2.2)
+    rack (3.0.4.1)
     rainbow (3.0.0)
     rb-fsevent (0.10.4)
     rb-inotify (0.10.1)