diff --git a/examples/simple_rails_api/Gemfile.lock b/examples/simple_rails_api/Gemfile.lock
index 153f4a4..f8db77a 100644
--- a/examples/simple_rails_api/Gemfile.lock
+++ b/examples/simple_rails_api/Gemfile.lock
@@ -136,7 +136,7 @@ GEM
     sqlite3 (1.4.2)
     thor (1.1.0)
     thread_safe (0.3.6)
-    tzinfo (1.2.9)
+    tzinfo (1.2.11)
       thread_safe (~> 0.1)
     websocket-driver (0.7.5)
       websocket-extensions (>= 0.1.0)