diff --git a/Gemfile.lock b/Gemfile.lock
index 47e56ea..0e66e1f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -82,7 +82,7 @@ GEM
       coderay (~> 1.1)
       method_source (~> 1.0)
     public_suffix (5.0.4)
-    rack (2.2.4)
+    rack (3.1.8)
     rainbow (3.1.1)
     rchardet (1.8.0)
     regexp_parser (2.5.0)