diff --git a/Gemfile.lock b/Gemfile.lock
index 8a9987f..33968e0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -94,7 +94,7 @@ GEM
     parslet (2.0.0)
     public_suffix (4.0.6)
     racc (1.8.1)
-    rack (2.2.8.1)
+    rack (2.2.12)
     rb-fsevent (0.11.0)
     rb-inotify (0.10.1)
       ffi (~> 1.0)