diff --git a/Gemfile.lock b/Gemfile.lock
index d2d09dc..4ed566d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -27,7 +27,7 @@ GEM
       racc (~> 1.4)
     public_suffix (3.0.3)
     racc (1.6.0)
-    rack (2.0.8)
+    rack (2.2.6.4)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rake (12.3.3)