diff --git a/Gemfile.lock b/Gemfile.lock
index cd984646..c9e08228 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -117,7 +117,7 @@ GEM
     parslet (2.0.0)
     public_suffix (4.0.7)
     racc (1.7.3)
-    rack (2.2.9)
+    rack (2.2.12)
     rack-contrib (2.5.0)
       rack (< 4)
     rack-livereload (0.3.17)