diff --git a/Gemfile.lock b/Gemfile.lock
index 0cbcf1a..a15f4c0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -135,7 +135,7 @@ GEM
     pusher-client (0.6.2)
       json
       websocket (~> 1.0)
-    rack (2.0.5)
+    rack (2.2.3)
     rack-cors (1.0.2)
     rack-test (1.0.0)
       rack (>= 1.0, < 3)