diff --git a/Gemfile.lock b/Gemfile.lock
index 9e74d47..e4953a1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -111,7 +111,7 @@ GEM
       forwardable-extended (~> 2.6)
     progress (3.4.0)
     public_suffix (3.0.3)
-    rack (2.0.5)
+    rack (2.2.6.4)
     rb-fsevent (0.10.3)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)